Compare the solubility of cobalt(II) sulfide in each of the following aqueous solutions:
0.10 M Co(CH3COO)2
0.10 M (NH4)2S
0.10 M NaCH3COO
0.10 M KNO3
More soluble than in pure water.
Similar solubility as in pure water.
Less soluble than in pure water.
