Ace Your ACS Exam: Ultimate Practice Tests & Expert Tips

Preparing for the ACS exam requires more than just memorization; it demands a solid understanding reinforced by consistent practice. One essential resource for achieving this understanding is the ACS Division of Chemical Education, which provides valuable guidelines. Effective study habits, coupled with resources like Khan Academy’s chemistry modules, are key to success. Finally, utilizing organic chemistry textbooks can provide a comprehensive understanding of the material, however, nothing beats a practice acs exam to truly assess preparedness and identify areas for improvement. Success lies in combining these tools for optimal learning.

Welcome, aspiring chemists! Your journey through the fascinating world of chemistry has likely brought you to a significant milestone: the American Chemical Society (ACS) Exams.

These exams are not just another test; they are a benchmark of your understanding and proficiency in various chemistry disciplines.

This guide is designed to equip you with the knowledge and strategies necessary to excel on these crucial assessments.

We’ll explore effective preparation techniques, with a particular emphasis on the strategic use of practice exams. This approach can dramatically improve your score.

Let’s lay the groundwork for mastering the ACS exams, transforming potential anxiety into confident competence.

The Relevance of ACS Exams

ACS exams serve as standardized assessments widely used in colleges and universities.

They evaluate a student’s comprehension of core concepts and their ability to apply these concepts to problem-solving.

Passing, or even excelling, on these exams can open doors to research opportunities, scholarships, and advanced coursework.

Moreover, strong performance can significantly enhance your academic profile, setting you apart as a knowledgeable and capable chemist.

The ACS exams are a significant indicator of your readiness for the next level.

The Power of Preparation

Effective preparation is paramount to success on any standardized exam, and the ACS exams are no exception.

Cramming information at the last minute simply won’t cut it.

A strategic and well-planned approach is essential.

This involves not only reviewing key concepts but also actively engaging with the material through practice questions and problem sets.

Practice Makes Perfect: The ACS Practice Exam Advantage

Among the various preparation strategies, utilizing practice ACS exams stands out as particularly effective.

These exams provide an invaluable opportunity to:

• Familiarize yourself with the exam format.
• Identify areas where you need further review.
• Build confidence in your ability to tackle challenging questions.

Think of it as a dress rehearsal before the main performance; practice exams allow you to fine-tune your skills and refine your approach.

By simulating the actual exam environment, you can reduce test anxiety and approach the real thing with a greater sense of calm and control.

A Glimpse at the ACS Exam Spectrum

The ACS offers a variety of exams, each tailored to specific areas within chemistry. Some of the most common include:

• General Chemistry: Covers fundamental principles and concepts applicable to all areas of chemistry.
• Organic Chemistry: Focuses on the structure, properties, and reactions of carbon-containing compounds.
• Physical Chemistry: Explores the underlying physical principles governing chemical systems.
• Analytical Chemistry: Deals with the methods for identifying and quantifying chemical substances.
• Inorganic Chemistry: Examines the properties and behavior of inorganic compounds.
• Biochemistry: Investigates the chemical processes occurring within living organisms.

Understanding the scope and focus of each exam is crucial for tailoring your preparation efforts.

By identifying the specific exam you’ll be taking, you can concentrate your studies on the most relevant topics.

The ACS exams are a significant indicator of your readiness for the next level. Now, let’s delve into the anatomy of these crucial assessments, starting with their fundamental purpose and the organization behind their creation. Understanding the structure and the different exam types will allow you to tailor your preparation more effectively.

Understanding the ACS Exam Landscape

The American Chemical Society (ACS) Exams are standardized assessments designed to evaluate a student’s knowledge and comprehension of chemistry. These exams serve as a benchmark, providing a consistent measure of understanding across various institutions and curricula.

What are ACS Exams?

ACS exams are comprehensive tests created and administered by the American Chemical Society. They are primarily used in college and university-level chemistry courses.

The exams gauge a student’s grasp of core chemical concepts, their ability to apply these concepts to problem-solving, and their overall proficiency in the subject matter. Think of them as a thorough check of your chemical expertise.

Purpose and Structure

The primary purpose of ACS exams is to provide a standardized assessment tool for chemistry educators. The exams allow them to evaluate student learning outcomes.

Furthermore, they enable comparisons of student performance across different courses and institutions. The ACS exams are typically multiple-choice.

The exams cover a wide range of topics relevant to the specific chemistry discipline being assessed. The structure is designed to test both factual knowledge and conceptual understanding.

The ACS Exams Institute

Behind the scenes, the ACS Exams Institute plays a pivotal role in developing and administering these standardized tests. The Institute is responsible for creating high-quality, reliable, and valid assessments that accurately measure student learning in chemistry.

The Role of the Institute

The ACS Exams Institute oversees the entire process of exam creation, from developing test blueprints to conducting rigorous psychometric analyses. This meticulous approach ensures that the exams are fair, accurate, and aligned with national standards for chemistry education.

The Institute also provides resources and support for educators who use the ACS exams, including study guides, practice materials, and scoring services. Consider the Institute your partner in preparing for these exams.

Exploring the Various ACS Exam Types

The ACS offers a variety of exams tailored to different chemistry disciplines. Each exam is designed to assess specific knowledge and skills relevant to that particular area of study. Understanding the different exam types is crucial for selecting the right one and focusing your preparation efforts effectively.

General Chemistry

The General Chemistry exam covers fundamental concepts such as atomic structure, chemical bonding, stoichiometry, thermodynamics, kinetics, equilibrium, acids and bases, and electrochemistry. It is often used in introductory chemistry courses to evaluate students’ understanding of core principles.

Organic Chemistry

The Organic Chemistry exam focuses on the structure, properties, reactions, and mechanisms of organic compounds. Key topics include nomenclature, functional groups, stereochemistry, reaction mechanisms (SN1, SN2, E1, E2), spectroscopy (NMR, IR, Mass Spec), and synthesis.

Physical Chemistry

The Physical Chemistry exam delves into the principles of thermodynamics, kinetics, quantum mechanics, statistical mechanics, and spectroscopy. It assesses students’ ability to apply mathematical and theoretical concepts to chemical systems.

Analytical Chemistry

The Analytical Chemistry exam covers quantitative analysis, instrumentation, data analysis, and chemical equilibrium. Key topics include titrations, spectroscopy, chromatography, electrochemistry, and statistical treatment of data.

Inorganic Chemistry

The Inorganic Chemistry exam focuses on the structure, bonding, properties, and reactions of inorganic compounds. Topics include coordination chemistry, organometallic chemistry, solid-state chemistry, and the chemistry of the elements.

Biochemistry

The Biochemistry exam explores the chemical processes within living organisms. It covers the structure and function of biomolecules (proteins, carbohydrates, lipids, nucleic acids), enzyme kinetics, metabolism, and bioenergetics.

The ACS Exams Institute is undeniably instrumental in shaping chemistry education through standardized assessments. But having a well-structured exam is just one piece of the puzzle. To truly conquer the ACS exams, you need a powerful weapon in your arsenal: practice. Let’s delve into why practice exams are so vital.

Unlocking Success: The Power of ACS Practice Exams

Practice ACS exams aren’t just helpful; they’re a cornerstone of effective preparation, acting as a bridge between theoretical knowledge and exam-day performance. They are crucial for diagnosing your strengths and weaknesses, building confidence, and mastering the exam’s intricacies.

Why Practice is Paramount

Think of practice exams as dress rehearsals for the main event. Would you expect a theatrical performance to be successful without rehearsals?

Similarly, approaching the ACS exam without ample practice is like walking onto a stage unprepared.

Practice allows you to simulate exam conditions, fine-tune your strategies, and solidify your understanding of core concepts.

It’s where you transform knowledge into application and build the mental stamina required for a comprehensive chemistry assessment.

Pinpointing Strengths and Weaknesses

One of the most significant benefits of practice exams is their diagnostic power. As you work through the questions, you’ll inevitably encounter areas where you excel and areas where you struggle.

Careful analysis of your performance on practice exams reveals specific topics that require more attention.

For instance, you might ace the organic reaction mechanisms but stumble on thermodynamics calculations. This targeted feedback allows you to tailor your study efforts.

Instead of blindly reviewing all the material, you can focus on strengthening your weak points, turning them into strengths.

This is far more efficient than simply rereading textbooks or reviewing notes without context.

Building Confidence and Alleviating Test Anxiety

Test anxiety can be a major obstacle to success, even for well-prepared students. The fear of the unknown and the pressure of performing can cloud your thinking and hinder your ability to recall information.

Practice exams are a potent antidote to test anxiety.

By repeatedly exposing yourself to the exam format and time constraints, you gradually desensitize yourself to the stress.

Each practice session becomes a mini-victory, boosting your confidence and reinforcing your ability to perform under pressure.

The more comfortable you become with the exam environment, the less anxiety you’ll experience on the actual test day.

Mastering the Exam Format

The ACS exams have a distinct format and style of questioning. Some questions test your recall of facts, while others require you to apply concepts to complex scenarios.

Practice exams provide invaluable exposure to this format.

By working through numerous practice questions, you become adept at recognizing patterns, understanding the nuances of the language used, and anticipating the types of questions that are likely to appear on the exam.

This familiarity not only increases your speed and accuracy but also reduces the likelihood of being caught off guard by unexpected question types. You will also be able to manage your time effectively.

The diagnostic power of practice exams allows you to pinpoint these areas needing improvement. With a clear understanding of your strengths and weaknesses, you can now shift your focus to strategic practice that will maximize your study sessions.

Strategic Practice: Maximizing Your Study Sessions

Effective practice transcends simply working through problems. It involves a deliberate and focused approach aimed at solidifying understanding, refining technique, and building confidence. This section provides actionable strategies to optimize your practice sessions and transform them into powerful learning experiences.

Choosing the Right Study Guides

Not all study guides are created equal. Selecting resources that align with your learning style and the specific content of your ACS exam is crucial. Look for study guides that offer:

• Comprehensive Coverage: Ensure all key topics are thoroughly explained.
• Practice Problems: Abundant practice questions with detailed solutions are a must.
• Clear Explanations: Concepts should be explained in a concise and understandable manner.
• Relevance: The content should directly correlate with the ACS exam syllabus.

Consider supplementing your primary study guide with other resources like textbooks, online tutorials, and ACS official materials. Diverse resources can provide different perspectives and deepen your understanding.

Conceptual Understanding vs. Rote Memorization

While memorizing formulas and facts is important, a true understanding of the underlying concepts is essential for success on the ACS exam. Questions often require you to apply your knowledge in novel situations, which rote memorization alone cannot prepare you for.

Focus on understanding why things work, not just how. Explore the relationships between different concepts and try to explain them in your own words. This active approach to learning will lead to deeper retention and improved problem-solving skills.

Time Management: Practice Makes Perfect

Time management is a critical skill for any exam, and the ACS exam is no exception. Practice exams provide an excellent opportunity to hone your time management abilities.

• Simulate Exam Conditions: Time yourself during practice exams, adhering to the actual exam time limits.
• Pace Yourself: Learn to allocate your time effectively across different sections and questions.
• Track Your Progress: Monitor your speed and accuracy to identify areas where you can improve.

By practicing under timed conditions, you’ll develop a sense of pace and learn to manage your time effectively on exam day.

Test-Taking Strategies

Mastering test-taking strategies can significantly improve your score. These strategies are not about "cheating" but about making the most of your knowledge and skills under pressure.

Approaching Different Question Types Strategically

The ACS exam features various question types, including multiple-choice, true/false, and sometimes even free-response questions. Develop a strategy for tackling each type:

• Multiple-Choice: Read the question carefully, eliminate obviously wrong answers, and choose the best option from the remaining choices.
• True/False: Pay close attention to qualifiers like "always," "never," and "sometimes." A single false element can make the entire statement false.
• Free-Response (if applicable): Plan your answer before writing, show your work clearly, and use proper units.

Educated Guessing and Process of Elimination

When faced with a difficult question, don’t be afraid to make an educated guess. Use the process of elimination to narrow down your choices. Even if you’re not sure of the correct answer, you can often eliminate one or two options that are clearly wrong. This increases your chances of selecting the correct answer.

Remember, it’s better to attempt every question than to leave some blank. With strategic practice and effective test-taking techniques, you can approach the ACS exam with confidence and maximize your chances of success.

Deep Dive: Mastering Specific Chemistry Disciplines

Having armed yourself with effective study strategies, it’s time to hone in on the specific chemistry disciplines that will appear on your ACS exam. This section provides targeted guidance, outlining key topics and offering sample practice questions designed to mirror the challenges you’ll face. Tailoring your preparation to the particular exam you’re taking is essential for maximizing your score.

General Chemistry: Foundations of Chemical Knowledge

General Chemistry lays the foundation for all other chemistry disciplines. Mastering these fundamental concepts is crucial for success in more advanced areas.

Key Topics in General Chemistry

• Atomic Structure and Theory: Understanding atomic orbitals, electronic configurations, and periodic trends.
• Stoichiometry and Chemical Reactions: Mastering balancing equations, mole calculations, and limiting reactants.
• Thermochemistry: Grasping enthalpy, entropy, and Gibbs free energy concepts.
• Chemical Kinetics: Analyzing reaction rates, rate laws, and factors affecting reaction speed.
• Chemical Equilibrium: Understanding equilibrium constants, Le Chatelier’s principle, and acid-base equilibria.
• Solutions: Calculating concentrations, understanding colligative properties, and solubility.

General Chemistry Practice Question Example

What is the pH of a 0.1 M solution of acetic acid (Ka = 1.8 x 10-5)?

(A) 1.0
(B) 2.9
(C) 4.7
(D) 7.0
(E) 9.3

(Answer: B)

Organic Chemistry: Exploring Carbon Compounds

Organic Chemistry focuses on the structure, properties, composition, reactions, and preparation of carbon-containing compounds.

Key Topics in Organic Chemistry

• Nomenclature: Naming organic compounds according to IUPAC rules.
• Structure and Bonding: Understanding hybridization, resonance, and isomerism.
• Functional Groups: Identifying and understanding the reactivity of key functional groups (alcohols, aldehydes, ketones, carboxylic acids, amines, etc.).
• Reactions and Mechanisms: Predicting reaction products and understanding reaction mechanisms (SN1, SN2, E1, E2, addition, elimination, substitution).
• Spectroscopy: Interpreting NMR, IR, and mass spectra to identify organic compounds.

Organic Chemistry Practice Question Example

Which of the following reaction conditions would favor an SN1 reaction?

(A) A strong nucleophile and a polar aprotic solvent.
(B) A bulky nucleophile and a polar protic solvent.
(C) A good leaving group and a polar protic solvent.
(D) A strong base and a nonpolar solvent.
(E) A primary alkyl halide.

(Answer: C)

Physical Chemistry: Applying Physics to Chemical Systems

Physical Chemistry uses principles of physics to study chemical systems. This often involves thermodynamics, kinetics, and quantum mechanics.

Key Topics in Physical Chemistry

• Thermodynamics: Laws of thermodynamics, enthalpy, entropy, free energy, and phase equilibria.
• Quantum Mechanics: Atomic and molecular structure, wave functions, and energy levels.
• Kinetics: Reaction rates, rate laws, activation energy, and reaction mechanisms.
• Statistical Mechanics: Connecting microscopic properties to macroscopic behavior.
• Spectroscopy: Absorption, emission, and scattering of light by molecules.

Physical Chemistry Practice Question Example

What is the change in entropy when one mole of an ideal gas expands isothermally from a volume of V1 to a volume of 2V1?

(A) 0
(B) R ln 2
(C) -R ln 2
(D) 2R
(E) -2R

(Answer: B)

Analytical Chemistry: The Art of Measurement

Analytical Chemistry focuses on the separation, identification, and quantification of chemical components in natural and artificial materials.

Key Topics in Analytical Chemistry

• Quantitative Analysis: Stoichiometry, titrations, gravimetric analysis, and data analysis.
• Spectroscopy: Atomic absorption, UV-Vis, and mass spectrometry.
• Chromatography: Gas chromatography (GC), high-performance liquid chromatography (HPLC), and ion chromatography.
• Electrochemistry: Electrochemical cells, potentiometry, and voltammetry.
• Data Analysis: Statistical analysis, error analysis, and calibration methods.

Analytical Chemistry Practice Question Example

A 25.0 mL sample of hydrochloric acid (HCl) is titrated with 0.10 M sodium hydroxide (NaOH). If 30.0 mL of NaOH is required to reach the equivalence point, what is the concentration of the HCl solution?

(A) 0.083 M
(B) 0.10 M
(C) 0.12 M
(D) 0.15 M
(E) 0.20 M

(Answer: C)

Inorganic Chemistry: Beyond Carbon

Inorganic Chemistry examines the properties and behavior of inorganic compounds, including metals, minerals, and organometallic compounds.

Key Topics in Inorganic Chemistry

• Coordination Chemistry: Structure, bonding, and isomerism of coordination complexes.
• Solid-State Chemistry: Crystal structures, defects, and properties of solids.
• Organometallic Chemistry: Metal-carbon bonds and their reactivity.
• Acids and Bases: Lewis acids and bases, hard-soft acid-base theory.
• Descriptive Chemistry: Periodic trends and the chemistry of specific elements.

Inorganic Chemistry Practice Question Example

What is the oxidation state of iron in [Fe(CN)6]3-?

(A) +1
(B) +2
(C) +3
(D) +4
(E) +5

(Answer: C)

Biochemistry: Chemistry of Life

Biochemistry explores the chemical processes within and relating to living organisms. This includes the study of proteins, carbohydrates, lipids, and nucleic acids.

Key Topics in Biochemistry

• Proteins: Amino acid structure, protein folding, enzyme kinetics, and protein function.
• Carbohydrates: Monosaccharides, disaccharides, polysaccharides, and their metabolism.
• Lipids: Fatty acids, triglycerides, phospholipids, and membranes.
• Nucleic Acids: DNA and RNA structure, replication, transcription, and translation.
• Metabolism: Glycolysis, Krebs cycle, oxidative phosphorylation, and other metabolic pathways.

Biochemistry Practice Question Example

Which of the following amino acids is most likely to be found on the exterior of a protein in an aqueous environment?

(A) Valine
(B) Leucine
(C) Isoleucine
(D) Aspartic Acid
(E) Phenylalanine

(Answer: D)

Remember, consistent practice with these topic areas will greatly improve your performance on the ACS exam. Use these examples to guide your study and tailor your approach to the specific exam you’re tackling. With focused effort, success is within reach!

Having explored the depths of each chemistry discipline, you might now feel like you’re juggling multiple beakers, each brimming with information. The key to mastering the ACS exam isn’t just about what you study, but how you study.

Boosting Efficiency: Optimizing Your Study Plan

A well-structured study plan transforms the daunting task of ACS exam preparation into a manageable, even empowering, experience. It’s about working smarter, not harder, and making the most of your time and resources.

Crafting Your Ideal Study Schedule

The cornerstone of effective preparation is a realistic and personalized study schedule. There’s no one-size-fits-all approach; your schedule should be tailored to your individual needs, learning style, and commitments.

Start by assessing your current workload and time availability. Be honest about the time you can realistically dedicate to studying each week.

Then, break down the material you need to cover into smaller, more digestible chunks. Allocate specific time slots to each topic, ensuring a balanced distribution across all chemistry disciplines relevant to your exam.

Don’t forget to factor in regular breaks and downtime. Burnout is the enemy of effective learning, so prioritize rest and relaxation to keep your mind fresh and focused.

• Prioritize Weak Areas: Dedicate more time to topics you find challenging.
• Be Consistent: Stick to your schedule as closely as possible to build momentum.
• Review Regularly: Schedule regular review sessions to reinforce your understanding.
• Adapt as Needed: Be flexible and willing to adjust your schedule as your needs evolve.

Maximizing Your Study Guides and Resources

Study guides and resources are invaluable tools in your ACS exam preparation arsenal. However, simply owning them isn’t enough. You need to know how to use them effectively.

Begin by selecting study guides that align with your learning style and the specific content of your exam. Look for guides that provide clear explanations, ample practice questions, and detailed answer keys.

Actively engage with the material. Don’t just passively read through the text. Take notes, highlight key concepts, and work through the practice problems.

Supplement your study guides with other resources, such as textbooks, online lectures, and practice quizzes. The more diverse your learning materials, the better equipped you’ll be to tackle the challenges of the ACS exam.

• Active Recall: Test yourself regularly to reinforce your knowledge.
• Concept Mapping: Create visual representations of key concepts and their relationships.
• Practice Questions: Work through as many practice questions as possible to hone your skills.
• Seek Clarification: Don’t hesitate to ask for help when you’re struggling with a particular topic.

The Power of Seeking Help

Chemistry can be a challenging subject, and it’s perfectly normal to encounter difficulties along the way. Don’t be afraid to seek clarification from instructors, teaching assistants, or peers.

Attending office hours is a great way to get personalized help and address any specific questions you may have. Collaborate with classmates to form study groups, where you can discuss concepts, share notes, and work through practice problems together.

Online forums and discussion boards can also be valuable resources for finding answers to your questions and connecting with other students who are preparing for the ACS exam. Remember, seeking help is a sign of strength, not weakness. It shows that you’re committed to your success and willing to go the extra mile to achieve your goals.

• Prepare Questions: Come to study sessions with specific questions.
• Explain Concepts: Teaching others is a great way to solidify your own understanding.
• Be Proactive: Don’t wait until the last minute to seek help.
• Utilize All Resources: Take advantage of all available resources, including instructors, TAs, and peers.

Having explored the depths of each chemistry discipline, you might now feel like you’re juggling multiple beakers, each brimming with information. The key to mastering the ACS exam isn’t just about what you study, but how you study. A well-structured study plan transforms the daunting task of ACS exam preparation into a manageable, even empowering, experience. It’s about working smarter, not harder, and making the most of your time and resources. But all the preparation in the world won’t matter if you stumble on exam day.

Conquering Exam Day: Strategies for Success

The day of the ACS exam is the culmination of weeks, maybe months, of dedicated study. Approaching it with a clear strategy can be the difference between simply completing the exam and truly conquering it. This section provides practical tips to ensure you’re fully prepared, mentally sharp, and able to manage your time effectively, transforming exam day from a source of anxiety into an opportunity to showcase your knowledge.

The Pre-Exam Checklist: Your Final Sanity Check

Think of this checklist as your mission control sequence before launch. A thorough review the day before and the morning of the exam can significantly reduce stress and ensure you haven’t overlooked any crucial details.

• Confirm the Location and Time: Double-check the exam location and start time. Account for traffic, parking, and potential delays. Arrive early to settle in.

• Gather Your Essentials: Prepare your permitted calculator, pencils, erasers, ID, and any other allowed materials the day before. Don’t scramble at the last minute.

• Review Key Formulas and Concepts: A light review of essential formulas and concepts can boost your confidence, but avoid intense cramming, which can increase anxiety.

• Prioritize Rest and Nutrition: Get a good night’s sleep and eat a nutritious breakfast. Your brain needs fuel to perform at its best. Avoid heavy, sugary foods that can lead to an energy crash.

• Plan for Comfort: Dress comfortably in layers to accommodate varying room temperatures.

Managing Anxiety: Staying Calm Under Pressure

Exam anxiety is a common experience, but it doesn’t have to derail your performance. Implementing effective anxiety management techniques can help you stay calm, focused, and in control.

• Practice Relaxation Techniques: Deep breathing exercises, meditation, or progressive muscle relaxation can calm your nerves. Practice these techniques in the days leading up to the exam.

• Visualize Success: Imagine yourself confidently answering questions and managing your time effectively. Positive visualization can boost your self-assurance.

• Reframe Negative Thoughts: Challenge negative thoughts and replace them with positive affirmations. Remind yourself of your preparation and capabilities.

• Focus on What You Can Control: You can’t control the difficulty of the exam or the performance of other students. Focus on your own performance and effort.

• Take Short Breaks When Needed: If you start to feel overwhelmed during the exam, take a few deep breaths or close your eyes for a moment to regain your composure.

Effective Time Management: Pacing Yourself to Success

Running out of time is a common source of stress during exams. Developing a time management strategy can help you pace yourself effectively and ensure you have enough time to attempt all the questions.

• Survey the Exam: Before you begin, quickly scan the exam to get an overview of the number and types of questions. This will help you allocate your time accordingly.

• Allocate Time Per Question: Divide the total exam time by the number of questions to determine how much time you can spend on each question. Stick to this allocation as closely as possible.

• Prioritize Questions: Answer the questions you know well first to build momentum and confidence. Mark more challenging questions to return to later.

• Don’t Dwell: If you’re stuck on a question, don’t waste too much time. Make an educated guess and move on. You can always come back to it later if you have time.

• Review Your Answers: If you finish early, use the remaining time to review your answers and check for any errors.

By implementing these strategies, you can transform exam day from a daunting challenge into an opportunity to showcase your hard work and achieve your desired results. Remember, you’ve put in the effort. Now, go out there and conquer that ACS exam!

Alright, you’ve got this! Remember that solid practice acs exam is essential. Now go ace that ACS exam!