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Redesign AP chemistry exam

Redesign AP chemistry exam. Subsequent slides are excerpts from AP chemistry workshop Effective 2013 – 2014 academic year Some 2013 – 2014 AP chemistry study guides may be inaccurate, i.e. do not reflect these changes If you are using any AP chemistry study guides prior to 2013, some

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Redesign AP chemistry exam

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  1. Redesign AP chemistry exam Subsequent slides are excerpts from AP chemistry workshop Effective 2013 – 2014 academic year Some 2013 – 2014 AP chemistry study guides may be inaccurate, i.e. do not reflect these changes If you are using any AP chemistry study guides prior to 2013, some content do not reflect the redesigned AP chemistry exam

  2. Reducing Breadth of the AP® Chemistry Course: Student memorization of ubiquitous factoids out of the context of application is no longer a part of the AP® Chemistry curriculum framework. Instead, the AP® Chemistry framework focuses on increasing students’ depth of understanding of enduring principles for the purpose of application of skills to solve non- routine problems.

  3. AP® Chemistry New Exam Design: Assessing the Learning Objectives

  4. E X A M P L E Particulate View Multiple Choice The structures and normal boiling points of dimethyl ether and ethanol are given in the table above. Which of the following diagrams best helps to explain the difference in boiling point of the two compounds?

  5. E X A M P L E Real-World ApplicationMultiple Choice Of the following metals, which would be the most appropriate choice for lining the inside of a railroad tank car used for transporting 1.0 M hydrochloric acid?

  6. Free-Response Section of the Exam • Types of Free-Response Questions: • Lab I: Engaging in experimental design • Lab II: Selection and analysis of authentic data/observations to identify patterns or explain phenomena • Representations I: Translation between representations • Representations II: Creating or analyzing atomic/molecular views to explain observations • Quantitative: Following a logical/analytical pathway to solve a problem

  7. E X A M P L E Short Part/Representation II Free Response Shown below are three models that can be used to represent a molecule of ammonia. Select one of the models. Indicate clearly which model you selected, and describe: one aspect of the ammonia molecule that the model represents accurately/well, and … one aspect of the ammonia molecule that the model does not represent accurately/well.

  8. E X A M P L E Multipart/Lab I (Experimental design)Free Response Design an experiment to collect data that supports the claim that a 1.0 MNaCl solution is a homogeneous mixture. Describe the steps, the data you would collect, and how the data support the claim. Laboratory equipment for your experiment should be taken from the list below. (You may not need all of the equipment.)

  9. E X A M P L E Multipart/QuantitativeFree Response The following diagram shows the change in concentration of the reactant A and product AB2 for the reaction represented by the equation above. The species A, B, and AB2 are gases. A + 2 B D AB2 • Indicate on the diagram where the reaction reaches equilibrium. • At time t, what is the relationship between Q (the reaction quotient), and K (the equilibrium constant)? • At equilibrium, what is the relationship between the rate of decomposition of AB2 and the rate of consumption of B for the reaction? • For the same reaction at a different temperature, 6 moles of A and 9 moles of B are combined in a rigid 1.0 L container, and the system reaches equilibrium. If there are 3 moles of AB2 present at equilibrium, what is the value of K for the reaction at this temperature?

  10. AP Multiple Choice Questions Label 90° 45° 0°

  11. Stimulus Stem Answer Choices Distractors Key

  12. Identifying Differences between Legacy and Redesigned Questions Legacy Exam Redesigned Exam Each question will address content and science practices within one or two learning objectives Each question will have four options, not five New exam will have question sets New exam will provide normally memorized data in the stem if its needed New exam will contain more particulate views of chemical reactions • Questions that test simple recall and memorization • Questions that start with “which of the following is not” • Questions whose answers include (A) I only, (B) II only, etc.

  13. What’s Out: Content Wise

  14. What’s Out: Content Wise

  15. What’s Out: Content Wise

  16. What’s Out: Content Wise

  17. What’s Out: Question Type

  18. What’s Out: Content & Question Type Correct statements about alpha particles include which of the following? I. They have a mass number of 4 and a charge of +2. II. They are more penetrating than beta particles. III. They are helium nuclei. I only III only I and II (D) I and III (E) II and III

  19. What’s In: Particulate View

  20. What’s In: Assessing Deeply Using Question Sets

  21. What’s In: Providing Needed Data in the Stimulus

  22. Which of the following best describes the principal type of solute-solvent interaction in each of above solutions ranked in order from strongest to weakest solute-solvent interaction. CH2Cl2dissolved in benzene KCl dissolved in water Ethanol dissolved in water

  23. Build the Key/Distractors (A) (B) (C) (D)

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