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+1 vote
88.3k views
in Chemistry by (48.0k points)

HCl was passed through a solution of CaCl2 , MgCl2 and NaCl. Which of the following compound(s) crystallise(s) ? 

(1) NaCl, MgCl2 and CaCl2 

(2) Both MgCl2 and CaCl2 

(3) Only NaCl 

(4) Only MgCl2

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1 Answer

+1 vote
by (48.4k points)
edited by

(3) Only NaCl

When HCl is passed thorugh the mixture Cl¯ ion concentration increases. Hence ionic product [Na+] [Cl¯] becomes more than solubility product. 

So NaCl will precipitate out.

precipitation (common ion effect)

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