why there is a need to add dilute supheric acid while crystallisation?
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The sulfuric acid will dissolve any residual copper metal or any copper oxides that exist as impurities in the copper sulfate, converting those impurities into copper sulfate.
H2SO4(aq)+Cu(s)⟶CuSO4(aq)+H2(g)HX2SOX4(aq)+Cu(s)⟶CuSOX4(aq)+HX2(g)
H2SO4(aq)+CuO(s)⟶CuSO4(aq)+H2O(l)HX2SOX4(aq)+CuO(s)⟶CuSOX4(aq)+HX2O(l)
2H2SO4(aq)+Cu2O(s)⟶2CuSO4(aq)+H2O(l)+H2(g)
H2SO4(aq)+Cu(s)⟶CuSO4(aq)+H2(g)HX2SOX4(aq)+Cu(s)⟶CuSOX4(aq)+HX2(g)
H2SO4(aq)+CuO(s)⟶CuSO4(aq)+H2O(l)HX2SOX4(aq)+CuO(s)⟶CuSOX4(aq)+HX2O(l)
2H2SO4(aq)+Cu2O(s)⟶2CuSO4(aq)+H2O(l)+H2(g)
rvk18:
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