## Question

###### Once you have separated the three salts in Study Question 111 into three test tubes, you now need to confirm their presence. (a) For $\mathrm{Pb}^{2+}$ ion, one way to do this is to treat a precipitate of $\mathrm{PbCl}_{2}$ with $\mathrm{K}_{2} \mathrm{CrO}_{4}$ to produce the bright yellow insoluble solid, $\mathrm{PbCrO}_{4} .$ Using $K_{\mathrm{sp}}$ values, confirm that the chloride salt should be converted to the chromate salt. (b) Suggest a method for confirming the presence of $\mathrm{A

Once you have separated the three salts in Study Question 111 into three test tubes, you now need to confirm their presence. (a) For $\mathrm{Pb}^{2+}$ ion, one way to do this is to treat a precipitate of $\mathrm{PbCl}_{2}$ with $\mathrm{K}_{2} \mathrm{CrO}_{4}$ to produce the bright yellow insoluble solid, $\mathrm{PbCrO}_{4} .$ Using $K_{\mathrm{sp}}$ values, confirm that the chloride salt should be converted to the chromate salt. (b) Suggest a method for confirming the presence of $\mathrm{Ag}^{+}$ and $\mathrm{Cu}^{2+}$ ions using complex ions.

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