_ap06_frq_chemistry

D one of the testing solutions used was 10 m naoh

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Unformatted text preview: n 7. Write an equation as part of your explanation. (d) One of the testing solutions used was 1.0 M NaOH . Describe the steps for preparing 100. mL of 1.0 M NaOH from a stock solution of 3.0 M NaOH using a 50 mL buret, a 100 mL volumetric flask, distilled water, and a small dropper. (e) Describe a simple laboratory test that you could use to distinguish between Na2CO3(s) and CaCO3(s). In your description, specify how the results of the test would enable you to determine which compound was Na2CO3(s) and which compound was CaCO3(s) . © 2006 The College Board. All rights reserved. Visit apcentral.collegeboard.com (for AP professionals) and www.collegeboard.com/apstudents (for students and parents). GO ON TO THE NEXT PAGE. 10 2006 AP® CHEMISTRY FREE-RESPONSE QUESTIONS 6. Answer each of the following in terms of principles of molecular behavior and chemical concepts. (a) The structures for glucose, C6H12O6 , and cyclohexane, C6H12 , are shown below. Identify the type(s) of intermolecular attractive forces in (i) pure glucose (ii) pure cyclohexane (b) Glucose is soluble in water but cyclohexane is not soluble in water. Explain. (c) Consider the two processes represented below. ∆ H ° = + 44.0 kJ mol−1 Process 1: H2O(l) → H2O(g) Process 2: H2O(l) → H2(g) + 1 O (g) 22 ∆ H ° = + 286 kJ mol−1 (i) For each of the two processes, identify the type(s) of intermolecular or intramolecular attractive forces that must be overcome for the process to occur. (ii) Indicate whether you agree or disagree with the statement in the box below. Support your answer with a short explanation. When water boils, H2O molecules break apart to form hydrogen molecules and oxygen molecules. © 2006 The College Board. All rights reserved. Visit apcentral.collegeboard.com (for AP professionals) and www.collegeboard.com/apstudents (for students and parents). GO ON TO THE NEXT PAGE. 11 2006 AP® CHEMISTRY FREE-RESPONSE QUESTIONS (d) Consider the four reaction-energy profile diagrams shown below. (i) Identify the two diagrams that could represent a...
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This note was uploaded on 10/01/2009 for the course OC 9876 taught by Professor Dq during the Spring '09 term at UC Merced.

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