Choose the substance in each pair with the highest boiling point. 5. What factor

Question

Choose the substance in each pair with the highest boiling point. 5. What factor, other than the delta H solution, determines whether an ionic compound will dissolve 6. An example of the hydrophobic effect is Consider the following solutions; 7. Which solution has the LOWEST freezing point? 8. Which solution has the HIGHEST freezing point? 9. If 0.20 moles of Na2S are dissolved in 100 mL of water, the [Na+] is 10. The extra intermolecular interaction responsible for the higher b.p. of water relative to H2S is

Explanation / Answer

1. (A) C6H14 (due to higher molar mass)

2. (A) NH3 (due to H- bonding)

3. (B) CCl4 (due to higher molar mass)

4. (A) the cis isomer

5. (A) entropy

6. (D) All of these

7. (D) 0.2 m Cr(NO3)3 due to highest number of particles

8. (B) 0.2 m KBr due to least number of particles

9. (B) 0.4 M (as Na2S furnishes two Na+)

10. (B) Hydrogen bonding ( as O is more electronegative than S)

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