Once you have separated the three salts in Study Question 111 into three test tubes, you now need to confirm their presence.
(a) For Pb²⁺ ion, one way to do this is to treat a precipitate of PbCl₂ with K₂CrO₄ to produce the bright yellow insoluble solid, PbCrO₄. Using K_sp values, confirm that the chloride salt should be converted to the chromate salt.

Data given in Question 111

You have a solution that contains AgNO₃, Pb(NO₃)₂, and Cu(NO₃)₂. Devise a separation method that results in having Ag⁺ in one test tube, Pb²⁺ in another, and Cu²⁺ in a third test tube. Use solubility guidelines and K_sp and K_f values.

Transcribed Image Text:

K₂CRO4 added Stirred PbCl₂ precipitate White PbCl₂ is converted to yellow PbCrO4 on adding K₂CrO4. ⒸCengage Learning/Charles D. Winters