After the addition of H 2 SO 4 , the above sample is centrifuged and decanted. W

Question

After the addition of H2SO4, the above sample is centrifuged and decanted. Which of the following cations remaining in the supernatant could you separate, by causing them to precipitate, with the addition of H2CO3? (Hint: H2CO3 is a source of HCO3 and carbonate ions. Select all that apply.)

(f) Choose one of the cations above and write the net precipitation reaction that occurs. (Use the lowest possible coefficients. Include states-of-matter under the given conditions in your answer.)

Explanation / Answer

SOL:In above cations Pb2+ is to form precipitate,when carbonicacid is added.

Pb2+ +H2CO3 =PbCO3+2H+
   (ppt)

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