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Equilibrium
Ionic Equilibrium – Common Ion Effect
1 question from 1 paper, each with its answer.
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- years asked, 2017–2026
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- of Equilibrium
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Concepts tested
- crystallisation of NaCl by common ion effect
All Questions
2020 1 question
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HCl was passed through a solution of $CaCl_2$, $MgCl_2$ and NaCl. Which of the following compound(s) crystallise(s)?$CaCl_2$ and $MgCl_2$ are more soluble than NaCl. On passing HCl gas, the concentration of $Cl^-$ ions increases (common ion effect), so the ionic product of NaCl exceeds its solubility product and only NaCl crystallises out.