Identify A, X, and Y in the unknown compounds AB and XY. If a substance cannot be classified as A, X, or Y, classify it as "Neither A, X, nor Y."
Mixing a solution (AB) containing cation A with potassium hydroxide (KOH) produces a white precipitate.
XY is insoluble in water but can be dissolved in acid.
When the solution of acid and cation X is mixed with (NH4)2SO4 , a white precipitate forms.
HCl reacts with the insoluble compound XY, dissolving it and producing a gas
Solubility rules for ionic compounds in water are shown for your reference.
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