Question

solubility of ionic compounds
classify each of the compounds as soluble or not soluble:
copper(ii) sulfate
cobalt(ii) bromide
zinc acetate

Explanation:

Step1: Recall solubility rules

Salts containing sulfate (\(SO_{4}^{2 - }\)) are generally soluble, except for \(BaSO_{4}\), \(PbSO_{4}\), \(CaSO_{4}\) (slightly soluble). Copper(II) sulfate (\(CuSO_{4}\)) has sulfate ion.

Step2: Recall solubility rules for bromides

Bromides (\(Br^{-}\)) are generally soluble, except for \(AgBr\), \(PbBr_{2}\), \(Hg_{2}Br_{2}\). Cobalt(II) bromide (\(CoBr_{2}\)) has bromide ion.

Step3: Recall solubility rules for acetates

Acetates (\(CH_{3}COO^{-}\)) are generally soluble. Zinc acetate (\(Zn(CH_{3}COO)_{2}\)) has acetate ion.

Answer:

copper(II) sulfate: soluble; cobalt(II) bromide: soluble; zinc acetate: soluble.