Ionic EquilibriumHard
Question
The precipitate of CaF2 (Ksp = 1.7 × 10-10) is obtained, when equal volumes of the following are mixed :
Options
A.10-10 M Ca2+ + 10-4MF-
B.10-2 M Ca2+ + 10-3MF-
C.10-5 M Ca2+ + 10-3MF-
D.10-3 M Ca2+ + 10-5MF-
Solution
Precipitation will be started when Ionic product > solubility product i, e, when
[Ca2+][F-]2 > Ksp
When equal volumes of 10-2 MCa2+ and 10-3MF- solutions are mixed then
Ionic product =
= 1.25 × 10-9
It exceeds Ksp (1.7 × 10-9), thus precipitation will be started.
For all other cases, Ionic product < Ksp
[Ca2+][F-]2 > Ksp
When equal volumes of 10-2 MCa2+ and 10-3MF- solutions are mixed then
Ionic product =
= 1.25 × 10-9
It exceeds Ksp (1.7 × 10-9), thus precipitation will be started.
For all other cases, Ionic product < Ksp
Create a free account to view solution
View Solution FreeMore Ionic Equilibrium Questions
Let the colour of the indicator HIn (colourless) will be visible only when its ionised form (pink) is 25% or more in a s...Silver ions are slowly added in a solution with [Br−] = [Cl−] = [CO32−] = [AsO43−] = 0.1 M. Which of the following compo...A solution of Na2CO3 is added drop by drop to litre of a solution containing 10-4 mole of Ba2+ and 10-5 mole of Ag+, if ...A well is dug in a bed of rock containing fluorspar (CaF2). If the well contains 20000 L of water, what is the amount of...A 50 ml solution of strong acid of pH = 1 is mixed with a 50 ml solution of strong acid of pH = 2. The pH of the mixture...