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1. Sodium bicarbonate (baking soda), NaHCO3, can be purified by dissolving it in hot water (60...

1. Sodium bicarbonate (baking soda), NaHCO3, can be purified by dissolving it in hot water (60 degrees Celsius), filtering to remove insoluble impurities, cooling it to 0 degrees Celsius to precipitate solid NaHCO3, and then filtering it to remove the solid, leaving soluble impurities in solution. Any NAHCO3 that remains in solution is not recovered. The solubility of NaHCO3 in hot water of 60 degrees Celsius is 164 g/L. Its solubility in cold water of 0 degrees Celsius is 69 g/L/ What is the percent yield of NaHCO3 when it is purified by this method?

2. A sample of solid calcium hydroxide is allowed to stand in water until a saturated solution is formed. A titration of 75.00mL of this solution with 5.00 x 10^-2 M hydrochloric acid requires 36.6 mL of the acid to reach the end point. What is the molar solubility of calcium hydroxide?

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