Compare the solubility of silver chromate in each of the following aqueous solutions: Clear All 0.10 M AgCH3COO 0.10 M Na2CrO4 0.10 M KCH3CO

Question

Compare the solubility of silver chromate in each of the following aqueous solutions: Clear All 0.10 M AgCH3COO 0.10 M Na2CrO4 0.10 M KCH3COO 0.10 M NH4NO3 More soluble than in pure water. Similar solubility as in pure water. Less soluble than in pure water.

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Calantha 4 years 2021-07-21T23:27:02+00:00 1 Answers 31 views 0

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  1. thachthao
    0
    2021-07-21T23:28:04+00:00
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    Solution :

    Comparing the solubility of silver chromate for the solutions :

    $0.10 \ M \ AgCH_3COO$    —–     Less soluble than in pure water.

    $0.10 \ M \ Na_2CrO_4$   —– Less soluble than in pure water.

    $0.10 \ M \ NH_4NO_3$   —–   Similar solubility as in the pure water

    $0.10 \ M \ KCH_3COO$   —–   Similar solubility as in the pure water

    The silver chromate dissociates to form :

    $AgCrO_4 (s) \rightleftharpoons 2Ag^+ (aq) +CrO_4^{2-}(aq)$

    When 0.1 M of $AgCH_3COO^-$ is added, the equilibrium shifts towards the reverse direction due to the common ion effect of Ag^+, so the solubility of Ag_2CrO_4 decreases.

    Both AgCH_3COO and $KCH_3COO$ are neutral mediums, so they do not affect the solubility.

     

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