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General Chemistry Principles, Patterns, and Applications, 2011

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9. Hydrogen bonding with waters of hydration will partially neutralize the negative charge on the terminal<br />

oxygen atoms on the XeO 6 4− ion, which stabilizes the solid.<br />

S T R U C T U R E A N D R E A C T I V I T Y<br />

1. One of the largest uses of methane is to produce syngas, which is a source of hydrogen for converting<br />

nitrogen to ammonia. Write a complete equation for formation of syngas from methane <strong>and</strong> carbon dioxide.<br />

Calculate ΔG° for this reaction at 298 K <strong>and</strong> determine the temperature at which the reaction becomes<br />

spontaneous.<br />

2. An alternative method of producing hydrogen is the water–gas shift reaction:<br />

CO(g) + H 2 O(g) → CO 2 (g) + H 2 (g)<br />

Use Chapter 25 "Appendix A: St<strong>and</strong>ard Thermodynamic Quantities for Chemical Substances at 25°C" to<br />

calculate ΔG° for this reaction at 298 K <strong>and</strong> determine the temperature at which the reaction changes from<br />

spontaneous to nonspontaneous (or vice versa).<br />

3. Predict the products of each reaction at 25°C <strong>and</strong> then balance each chemical equation.<br />

a. CsH(s) + D 2 O(l) →<br />

b. CH 3 CO 2 H(l) + D 2 O(l) →<br />

c. H 3 PO 4 (aq) + D 2 O(l) →<br />

d. NH 2 CH 2 CO 2 H(s) + D 2 O(l) →<br />

e. NH 4 Cl(s) + D 2 O(l) →<br />

4. Using heavy water (D 2 O) as the source of deuterium, how could you conveniently prepare<br />

a. D 2 SO 4 ?<br />

b. LiD?<br />

5. What are the products of reacting NaH with D 2 O? Do you expect the same products from reacting NaD <strong>and</strong><br />

H 2 O? Explain your answer.<br />

6. A 2.50 g sample of zinc metal reacts with 100.0 mL of 0.150 M HCl. What volume of H 2 (in liters) is produced<br />

at 23°C <strong>and</strong> 729 mmHg?<br />

7. A chemical reaction requires 16.8 L of H 2 gas at st<strong>and</strong>ard temperature <strong>and</strong> pressure. How many grams of<br />

magnesium metal are needed to produce this amount of hydrogen gas?<br />

Saylor URL: http://www.saylor.org/books<br />

Saylor.org<br />

1933

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