How to do number 2d? What is the equilibrium pH of a solution that will dissolve

Question

How to do number 2d? What is the equilibrium pH of a solution that will dissolve 0.1 mole of PbCl2 in 1.0L of water?

2 The solubility due to the addition of oH- to a saturated solution of Pbc12 creases its formation of the complex ion [Pb(OH 3] a. Write a balanced net ionic equation for this process lat) b. The molar solubility of PbC12 is 0.016 M. Calculate the Ksp for P x (2x) c. Given, Kr for [Pb(OH)3]- 3.8 x 1014. Calculate K for this reaction you wrote in part a. IMA d what is the equilibrium pHof a solution that will dissolve o.1 mole of PbC12 in 1.0 Lof water.

Explanation / Answer

From 2(c) to dissolve 1 mol of PbCl2 it needs 3 mol of OH- ions.

Then to dissolve 0.1 mol of PbCl2. it needs 0.3 mol of OH- ions.

So. Concept. Of hydroxyl ions needed = 0.3/1.0 = 0.3 M

pH =14+lo[OH-] = 14 + log(0.3) = 14 - 0.523 = 13.5

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