2. Each of the following salts can be prepared from an acid and a base. Write the balanced molecular equation and the net ionic equation for the preparation of each. Indicate states of the reactants and products [(aq), (s), (l)]. Review solubility rules if necessary to determine the solubility of the reactants.

(a) KCH3CO2 (aq)

(b) CsNO3 (aq)

(c) Na2CO3 (aq)

7. A sample contains an unknown amount of the mineral calcite, CaCO3. If 0.6558 g of the sample requires 45.67 mL of 0.1000 M HCl to neutralize the CaCO3 completely, what is the percentage of CaCO3 in the sample? The molar mass of CaCO3 is 100.09 g/mol. The balanced equation for the reaction is:

CaCO3 +2HClH2O+CO2 +CaCl2