1. The carbon dioxide of the atmosphere, being a nonmetallic oxide and acid anhydride, has a low solubility in rain water but produced a slightly acidic solution. Write an equilibrium equation for the dissolution of carbon dioxide in water and identify the acid that is formed.
2. Calcium carbonate, the major component of limestone, is slightly soluble in water. Write an equilibrium equation showing the slight solubility of calcium carbonate in water.
3. Write a Bronsted equation for the weak acid formed and showing how it produces hydronium ion in aqueous solution.
4. Using Lechatelier's principle, explain how the weak acid formed in rainwater causes the dissolution of calcium carbonate. The consequence of this reaction contributes to the degree of hardness in underground and surface water supplies and also accounts for the formation of stalagmites and stalactites.
Tags: