1. The K sp of silver chloride is 1.8 x 10-10. What is the molar solubility of A

Question

1. The Ksp of silver chloride is 1.8 x 10-10. What is the molar solubility of AgCl?

2. Magnesium chloride is soluble in water according to the following reaction:

MgCl2 (s) Mg2+ (aq) + 2Cl- (aq)

What molar analytical concentration of MgCl2 would be required to shift the molar solubility of AgCl to 0.000000677 M?

3. What is the ionic strength of the above solution saturated with AgCl at equilibrium?

4. What is the activity coefficient of the silver ion in the above solution saturated with AgCl?

5. What is the activity of the silver ion in the above solution saturated with AgCl?

Explanation / Answer

1) s^2 = 1.8* 10^-10

s = 1.3416*10^-5 M

2) The Ksp will remain the same for the second situation also

Agcl ---> Ag+ + Cl-

s s+x

s here is = 0.000000677 M

so

Ksp = 1.8* 10^-10 =s (s+x)

=2.65*10^-4 M = x

So

MgCl2 (s) Mg2+ (aq) + 2Cl- (aq)

we know x was from cl =2.65*10^-4 M

so MgCl2 concentration will be = 1/2 * x = 1.32*10^-4 M

3) The ionic strentgh of the ions will be

Ag+ = 0.000000677 M

Cl- = s+x = 2.6655*10^-4 M

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