1.

Predict whether a precipitate will be formedor not on mixing 20 ml of 0.001 N NaCl solution with 80 ml of 0.01 N AgNO_(3) solution. K_(sp) for AgCl=1.5xx10^(-10).

Answer»


Solution :After mixing, total volume of solution = 100 ML
20 ml of `10^(-3) ` M NACL sol `-=` 100 ml of ? M
Molarity of NaCl solution in the final solution `=(20xx10^(-3))/(100) = 2xx10^(-4) M or [Cl^(-) ] = 2 xx 10^(-4) M`
80 ml of `10^(-2)` M `AgNO_(3)` sol `-=` 100ml of ? M
Molarity of `AgNO_(3)` solution in the final solution `= (80xx10^(-2))/(100) = 8xx10^(-3)` M or `[AG^(+)]=8xx10^(-3)M`
`:. ` IONIC product `=[Ag^(+)][Cl^(-)]=(8xx10^(-3))(2xx10^(-4))=16xx10^(-7) = 1.6 xx 10^(-6)`
which is greater than the solubility product. Hence, ppt. will be FORMED.


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