HCl was passed through a solution of CaCl 2 , MgCl 2 and NaCl . Which of the following compound(s)…

HCl was passed through a solution of CaCl2, MgCl2 and NaCl. Which of the following compound(s) crystallise(s)?
  1. Only NaCl
  2. Only MgCl2
  3. NaCl,MgCl2 and CaCl2
  4. Both MgCl2 and CaCl2

Solution

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.
Filtrate →HCl gas passed  pure NaCl precipitation (common ion effect)

Asked in: NEET 2020 (Phase 1)

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