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An unknown salt is either KBr, NH4Cl, KCN, or K2CO3. If a 0.100 M solution of the salt is neutral, what is the identity of the salt?


    It must be KBr. Neither K^+ nor Br^- are hydrolyzed in aqueous solution.
    NH4Cl gives an acid solution. (NH4^+) is hydrolyzed.
    HCN gives a basic solution. CN^- is hydrolyzed.
    K2CO3 gives a basic solution. CO3^2- is hydrolyzed.

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