# SK015 Chapter 7.3 Effect of common ions in solubility of salt.

Jika serbuk milo dicampurkan dalam air milo, pastinya tambahan milo itu sukar untuk dilarutkan kerana sudah ada milo dalam air tersebut. Maka, keterlarutan milo berkurang dalam air milo berbanding air kosong. Inilah yang dikatakan sebagai common ion effects.

When you add KCl in distilled water, KCl will dissolve easily. But, when we add KCI in AgCl, the solubility decrease because there are present of common ion, which is chloride ion.

Past Year Question 2009/2010

The solubility product of lead (II) bromide, PbBr2 is 8.0 x 10-5 at room temperature. Determine the molar solubility of lead (II) bromide, PbBr2 in 0.10M sodium bromide, NaBr solution. [ 8 marks]

Tutorial KMPK 2021/2022

Question 19 (b)

19 Determine whether a precipitate will formed in the following situations.

(a) 25.0 cm3 of 1.0×10‒5 M silver nitrate is added to 25.0 cm3 of 1.0×10‒5 M sodium chloride.
[Ksp AgCl = 1.0×10‒10]

(b) 50.0 cm3 of a 0.025 mol dm‒3 MnSO4 solution is added to 50.0 cm3 of 0.050 mol dm‒3 ammonia solution.
[Ksp Mn(OH)2 = 2.0×10‒13 , Kb NH3 = 1.8×10‒5]

Question 20

20 The solubility product, Ksp of lead iodide, PbI2 is 7.1×10‒9 . Calculate :
(a) molar solubility of PbI2 in water
(b) molar solubility of PbI2 in a solution of 0.1 M Pb(NO3)2
(c) explain the differences in the molar solubility values of PbI2 in both cases.