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- Students taking digital exams will not be asked to draw or graph as part of their response—rather, these skills may be assessed by asking students to provide explanations about given diagrams or other stimuli. No handwritten or photographed...
- The information below applies to AP Chemistry only. View a summary of all AP Exam formats. Learn more about testing. AP Daily and AP Classroom Short, searchable AP Daily videos can be assigned alongside topic questions to help you cover all course...
- Both can be taken multiple times, and can be accessed directly in the digital testing application. Teachers can also access digital practice from the teacher dashboard, available beginning April Scratch paper is permitted for notes or planning, but students cannot handwrite or otherwise upload responses. All responses can be typed on a regular computer keyboard, along with a selection of formatting options including superscript and subscript and special characters that can be accessed by clicking the Omega button: Some free-response question prompts reference a specific question part. Students can click on the » symbol shown in the prompt to automatically scroll to the referenced location. A calculator is allowed on all sections of the digital exam. However, students will need to bring their own calculator, because the digital testing application does not include one.
- The AP Chemistry Equations and Constants and Periodic Table can be accessed with the Reference button in the upper right button bar of the application. The interface and layout are different in the digital testing application than in the paper exam booklet, so students should take a look when they take digital practice. However, free-response questions will each be presented in multiple parts, and students will answer each part on a separate screen. They may move among the parts of the question currently being answered, with the Back and Next buttons. Students will see them at the beginning of each section, and can access them at any time during the exam. Please note that the exam timer starts when the directions appear.
- While students should read the directions, they should be aware that the timer will be running while they do so. Teachers and students can view the full text of the exam and section directions in advance of the exam. More information about taking digital exams is available in the Digital Testing Guide. Teachers and coordinators will access the dashboard from their personalized AP login page after signing in through AP Central or through myap.
- Unit 1: Atomic Structure and Properties. Topics may include: moles and molar mass, mass spectroscopy of elements, elemental composition of pure substances, composition of mixtures, atomic structure and electron configuration, photoelectron spectroscopy, periodic trends, valence electrons and ionic compounds. Topics may include: types of chemical bonds, intramolecular force and potential energy, structure of ionic solids, structure of metals and alloys, Lewis diagrams, resonance and formal charge, VSEPR and bond hybridization. Unit 3: Intermolecular Forces and Properties. Topics may include: intermolecular forces, solids, liquids, and gases, kinetic molecular theory, solutions and mixtures, photoelectric effect.
AP Chemistry Exam Free-Response Question And Scoring Information Archive
Unit 4: Chemical Reactions. Topics may include: introduction for reactions, net ionic equations, representations of reactions, physical and chemical changes, stoichiometry, types of chemical reactions. Unit 5: Kinetics. Topics may include: reaction rate, introduction to rate law, elementary reactions, collision model, introduction to reaction mechanisms, multistep reaction energy profile, and catalysis. Unit 6: Thermodynamics. Unit 7: Equilibrium. Unit 8: Acids and Bases. Topics may include: introduction to acids and bases, pH and pOH of strong acids and bases, acid-base reactions and buffers, molecular structure of acids and bases, pH and pK a , properties of buffers.- Unit 9: Applications of Thermodynamics. You are not permitted to use a calculator during this section of the exam. Grading: This section is scored by a computer. Grading: You get most of your points on this section for showing the process that got you to the answer. The responses are scored by a committee of high school and college teachers and are graded according to a standard set at the beginning of the grading period by the chief faculty consultants. AP Chem Equation Sheet Tables containing commonly used equations and constants in chemistry are provided with the AP Chemistry exam and can be used on both the multiple-choice and free-response questions.
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Test takers are also provided with a periodic table of the elements. Colleges are generally looking for a 4 or 5 on the AP Chemistry exam, but some may grant credit for a 3. Check out our overview of how to earn AP credit. Each test is curved so scores vary from year to year.- Galvanic Voltaic and electrolytic cells Cell potential and free energy Cell potential under nonstandard conditions Electrolysis and Faraday's Law Join these kooky characters in the new hit dramedy Bonds: They're Stuck Together. Oh man, you've never seen chemistry like this before. Will they? Won't they? Who cares? One of the single most important parts of your college application is what classes you choose to take in high school in conjunction with how well you do in those classes.
- Our team of PrepScholar admissions experts have compiled their knowledge into this single guide to planning out your high school course schedule. I'll also walk you through the answers to give you an idea of how to approach and solve them. Sample Multiple-Choice Question Many questions on the AP Chemistry exam ask you to make predictions about chemical properties or reactions based on data like this. In this case, the answer is A. The coulombic attractions are weaker in NaCl than they are in NaF because the ionic radius of F- is smaller than that of Cl-.
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The attraction between molecules will be greater in NaF, and the bonds will be harder to break. Sample Short Free-Response Question In this question, part a requires an understanding of why or why not reactions might occur between molecules. First, you need to explain how collision energy affects whether two molecules will react with each other. Only collisions with enough energy to overcome the activation energy barrier typically represented by the variable Ea will reach the transition state and break the F-F bond. Next, you need to identify one other factor besides collision energy that influences the likelihood of a reaction between two colliding molecules. You could say that in order for a collision to be successful, the molecules must have the correct orientation. You would need to mention the specific bonds being formed and broken. Only molecules with the correct orientation can start to form the N-F bond and break the F-F bond. The molecules have to contact each other in very specific places for the transition to take place.- Part b is about rate laws, and the first part is pretty straightforward. You then need to explain why you made your choice to get the last point on this question. The second rate law is the correct answer because Step I is the slower, rate-determining step in the reaction mechanism. Step I is an elementary reaction, so its rate law comes from the stoichiometry of the reaction molecules, NO2 and F2. Sample Long Free-Response Question In part a of this question, you're asked to write two net-ionic equations. Writing balanced equations based on experimental scenarios is an important skill for the test. In part b, you need an understanding of what causes electrical conductivity in chemical substances and why the conductivity decreases at first in the situation described. Part c requires some attention to detail in unit conversion as well as a logical assessment of the information you're given. Molarity is moles per liter, so the question is how many moles of Ba OH 2 were there per liter in the original solution without the added H2SO4.
- Since the conductivity starts going back up after 30 ml of H2SO4 are added, that means that at that point the number of moles of H2SO4 is equal to the number of moles of BaOH2 in the original solution. We can calculate that 30 mL of 0. There should be the same number of moles of BaOH2 in the original solution, so we can divide 0. The solubility product constant equals the product of the number of ions of each component of the precipitate.
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In this case, you would need to mention the common ion effect and the fact that if you add sulfate ions to an equilibrium reaction involving other sulfate ions, the reaction will consume the added ions to reach a new equilibrium. Equilibrium must be reached. Transition from doing As you can see, the questions on the AP Chemistry test range from short and sweet to long and moderately evil. An important thread that runs through all of them is that you need to know basic background information about why certain substances act the way they do. For example, why do some substances have higher boiling points than others? What does collision energy have to do with molecular reactions? Why do some chemical substances conduct electricity? Being able to justify your answers is very important.
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