Chemistry, 09.03.2021 07:30 meramera50
A saturated solution is prepared by adding excess PbI2
(s) to distilled water to form 1.0L of solution at
25°C. The concentration of Pb
2+
(aq) in the same saturated solution is found to be 1.3 x 10
-3 M. The
chemical equation for the dissolution of PbI2
(s) in water is shown below.
PbI2
(s) ⇄ Pb
2+
(aq) + 2 I
-
(aq)
a. Write the equilibrium-constant expression for the equation
b. Calculate the molar concentration of I
-
(aq) in the solution
c. Calculate the value of the equilibrium constant, Ksp
d. An additional 1.0 L of water is added, bringing the total volume of the solution to 2.0 L and the
solution remains saturated. Calculate the molar concentration of Pb
2+
(aq) in the solution.
e. Solid NaI is added to the saturated solution of PbI2
. Assuming the volume of the solution does
not change, does the molar concentration of Pb
2+
(aq) in the solution increase, decrease, or
remain the same? Justify your answer.
Answers: 3
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A saturated solution is prepared by adding excess PbI2
(s) to distilled water to form 1.0L of solut...
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