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Addition of which of the following substances will increase the solubility of CuCO3 (s) in water ?

CuCO3 ---- Cu^2+ (aq) +2 CO3^2- (aq)

1. Aqueous hydrochloric acid
2. Aqueous sodium carbonate
3. Solid copper (II) carbonate

a) 1 only
b) 2 only
c) 3 only
d) 1 and 3 only
e) 1,2 and 3 only

  • Chemistry -

    You haven't written the correct equation. It should be
    CuCO3(s) ==> Cu^2+(aq) + CO3^2-(aq)

    I'll give you a couple of hints.
    Adding HCl will react with CO3^2- to form H2O and CO2, thus decreasing CO3^2-. Remember Le Chatelier's Principle--decreasing CO3^2- will drive the reaction which way?

    Adding Na2CO3 will increase (CO3^2-). Which way will that drive the reaction.

    Adding solid CuCO3. You already have solid CuCO3 present; adding more will have no effect.

  • Chemistry -

    2 only

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