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NEET2020ChemistryIonic EquilibriumActual

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

Options

  1. AOnly NaCl
  2. BOnly MgCl 2
  3. CNaCl , MgCl 2 and CaCl 2
  4. DBoth MgCl 2 and CaCl 2

Correct answer

A. Only NaCl

Step-by-step 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)

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