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Multiple Choice

Dissociation of Na2SO4 in water yields which ions?

Ionic compounds dissolve by breaking into their constituent ions. Sodium sulfate contains two sodium ions for every sulfate ion, so when it dissolves in water it separates into two Na+ ions and one SO4 2- ion per formula unit. In the solution you have these free ions, with no hydroxide ions produced from just dissolving the salt. The result is a solution containing sodium ions and sulfate ions in a 2:1 ratio: Na+ and SO4 2-.

Ionic compounds dissolve by breaking into their constituent ions. Sodium sulfate contains two sodium ions for every sulfate ion, so when it dissolves in water it separates into two Na+ ions and one SO4 2- ion per formula unit. In the solution you have these free ions, with no hydroxide ions produced from just dissolving the salt. The result is a solution containing sodium ions and sulfate ions in a 2:1 ratio: Na+ and SO4 2-.