
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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#### Question 16
**What is the solubility of Ca(OH)₂ in 0.0860 M Ba(OH)₂?**
The K_sp for Ca(OH)₂ is known to be 4.68 x 10⁻⁶.
#### Question 17
**A buffer solution was made by dissolving 10.0 grams of sodium acetate in 200.0 mL of 1.00 M acetic acid.**
Assuming the change in volume when the sodium acetate is not significant, estimate the pH of the acetic acid/sodium acetate buffer solution. The K_a for acetic acid is 1.7 x 10⁻⁵.
#### Question 18
**Determine the oxidation number of each element in the following compounds:**
- (a) BaO₂
- (b) (NH₄)₂MoO₄
- (c) Na₃Co(NO₂)₆
- (d) CS₂
#### Question 19
**Identify the species being oxidized and reduced in each of the following reactions:**
a. Cr⁺ + Sn⁴⁺ → Cr³⁺ + Sn²⁺
b. 3 Hg²⁺ + 2 Fe (s) → 3 Hg₂ + 2 Fe³⁺
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These questions involve solubility equilibrium, buffer solutions, oxidation states, and redox reactions, providing a comprehensive approach to understanding key chemical principles.
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