Classify each of the compounds as soluble or not soluble: potassium phosphate, copper(II) sulfate, lead acetate. Option 1: Potassium phosphate - Soluble, Copper(II) sulfate - Soluble, Lead acetate - Not soluble Option 2: Potassium phosphate - Not soluble, Copper(II) sulfate - Soluble, Lead acetate - Soluble Option 3: Potassium phosphate - Soluble, Copper(II) sulfate - Not soluble, Lead acetate - Soluble Option 4: Potassium phosphate - Soluble, Copper(II) sulfate - Soluble, Lead acetate - Soluble