1) Solid sodium chromate is slowly added to 175 mL of a 0.0381 M barium nitrate solution. The concentration of chromate ion required to just initiate precipitation is [M].
2) A student measures the molar solubility of silver carbonate in a water solution to be 1.24×10^-4 M. Based on her data, the solubility product constant for this compound is [ ].