Question

based on the solubility rules, which one of the following should be soluble in water? caso4 baso4 pbso4 k2so4 agcl

Explanation:

Step1: Recall sulfate solubility rule

Most sulfates are soluble, but calcium sulfate ($\text{CaSO}_4$), barium sulfate ($\text{BaSO}_4$), and lead - sulfate ($\text{PbSO}_4$) are insoluble.

Step2: Recall potassium salt solubility rule

Potassium salts are always soluble. Potassium sulfate ($\text{K}_2\text{SO}_4$) is a potassium salt.

Step3: Recall chloride solubility rule

Silver chloride ($\text{AgCl}$) is insoluble in water.

Answer:

$\text{K}_2\text{SO}_4$