Question

1)The mass of silver cyanide that is dissolved in 175 mL of a saturated solution is _grams.

Answer 1

Ksp of AgCN = 1.2 x 10^-16

AgCN(s) -------------------> Ag+(aq) + CN-(aq)

Ksp = [Ag+][CN-]

1.2 x 10^-16 = S^2

S = 1.1 x 10^-8 M

solubility = 1.1 x 10^-8 M

moles = molarity x volume

            = 1.1 x 10^-8 x 0.175

             = 1.92 x 10^-9

mass = moles x molar mass

         = 1.92 x 10^-9 x 133.9

         = 2.57 x 10^-7 g