AP Chemistry Practice Test 36

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Question 12 questions

Time 18 minutes

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1. Dissolving one mole of each of the oxoacids HNO2, HClO4, H2CO3, and H3PO4 in 2.0 L of distilled water results in solutions with different pH values. Arrange these acid solutions from the one with the highest pH to the one with the lowest pH.

2.

CompoundFormulaNormal Boiling Point, K
EthaneCH3CH3185
EthanalCH3COH294
EthanolCH3CH2OH348
Ethanoic acidCH3CO2H391

Based on the data in the table above, which of the following substances has lowest vapor pressure at any given temperature?

3. Based on periodic relationships, the bond strength, and the concept relating bond strength to acid strengths, which of the following correctly predicts the strength of binary acids from strongest to weakest?

4. Silver metal, often amalgamated with mercury, is used to reduce substances to a desired oxidation state. If the silver metal amalgam cannot be used because of concerns about mercury, which of the following would be a reasonable and safe substitute?

5. Which of the following particulate diagrams best represents the reaction of carbon with oxygen to form carbon dioxide?

6. 0.25 mol of a weak, monoprotic acid is dissolved in 0.25 L of distilled water. The pH was then measured as 4.26. What is the pKa of this weak acid?

7. Sulfurous acid is a weak acid, while sulfuric acid is a much stronger acid because

8. To prepare a buffer, all of the following are needed except

9. The photoelectron data for sodium are shown below.

Photoelectron Spectroscopy Data Table for Sodium

Binding Energy (MJ)Relative Number of Electrons
0.501
3.676
6.842
1042

Which of the following statements is not true about this data?

10. Identify the Brønsted-Lowry conjugate acid-base pair in the following list.

11. Chemical reactions can be classified as either heterogeneous or homogeneous. Which of the following equations below is best classified as a heterogeneous reaction?

12. Which of the following may need to be balanced using the ion-electron method ?