# chemistry

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What is the solubility of AgCl when it is in a solution of 0.15 M NaCl? (AgCl has Ksp = 1.8 x 10-10.) Make a reaction table. Include rows for initial concentration, change in concentration, and equilibrium concentration. Write down the equation for the Ksp of the reaction. What is the concentration of Cl-? Plug that number into the Ksp equation to determine the solubility of AgCl when it is in a solution of 0.15 M NaCl

• chemistry -

...........AgCl ==> Ag^+ + Cl^-
I............x........0........0
C...........-x.........x........x
E...........-x..........x......x

........NaCl ==> Na^+ + Cl^-
I.......0.15M.....0......0
C.......-0.15M....0.15....0.15
E........0.........0.15...0.15

Ksp + (Ag^+)(Cl^-)
1.8E-10 = (x)(x+0.15) note:(Cl^-) = x+ 0.15 or x from the AgCl + 0.15 from the NaCl. This a problem illustrating the common ion effect. The solubility of AgCl is DECREASED significantly by the addition of a common ion.
Solve for x.

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