1. A solid mixture may contain AgNO3, NiSO4, KCl, and Ca(NO3)2. Treatment of the solid with water leaves a white insoluble residue. The water soluble portion is colorless and gives a precipitate when treated with 1 M Na2CO3. Identify the components of the mixture.

2. Which of the acids that can be used to dissolve an alloy (i.e., mixture of metals) produces the largest number of volatile compounds containing cations of the qualitative analysis scheme?

3. Which compound of silver is the least soluble in both water and dilute strong acid?

4. Identify the cation and anion. Express the answer in terms of the formula of the salt. A green powder dissolves in water and gives a pure white precipitate with acidic AgNO3. When the solution is heated with H2O2 and NaOH, it turns a yellow color, which changes to orange in acid.

5. Consider the following mixture; FePO4 and AlCl3. Would it dissolve completely in water? Would it dissolve in 6 M HNO3 but not in water? Would it dissolve in 6 M NaOH? Would it dissolve in 6 M NH3?