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MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryIonic equilibriumPreferential precipitation of salts

At  18ºC,  the  solubility  product  of  AgCl  is 1.8  ×  10–10.  In  the  solution,  the  value  of  [Ag+]  is 4  ×  10–3mol/litre.  The  value  of  [Cl–]  to  precipitate AgCl from this solution should be greater than

A.4.5 × 10–8mol/litre✓ Correct
B.7.2 × 10–12mol/litre
C.4.0 × 10–3mol/litre
D.4.5 × 10–7mol/litre
Explanation

We know that, solubility product of AgCl can be calculated as- The solubility can be found as- Let concentration of A and B ions will be- x sp 10 3 10 3 7 8 AgCl Ag Cl K [Ag ][Cl ] 1.8 10 [4 10 ][ ] [ ] 1.8 10 / 4 10 0.45 10 4.5 10 x x x x x x x x M M If the ionic product exceeds this value, then precipitation takes place. Acid base Titration

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