the value for the Ksp of silver chromate is reported to be 1.1 x 10^-12. in a saturated solution of silver chromate, the silver ion concentration is found to be 2.5 x 10^-4M. what must the chromate ion concentration be?
Ag2CrO4 ==> 2Ag^+ + CrO4^-2
Ksp = (Ag^+)^2(CrO4^-2)
Plug in Ag^+ from the problem, square it, divide by Ksp in the problem and Voila, the (CrO4^-2) = ??
1.1 x 10^-12
To find the chromate ion concentration in a saturated solution of silver chromate, we can use the solubility product constant (Ksp) expression and the given silver ion concentration.
The balanced equation for the dissolution of silver chromate is:
Ag2CrO4 ⇌ 2 Ag+ + CrO42-
The Ksp expression can be written as:
Ksp = [Ag+]^2 [CrO42-]
Given:
Ksp = 1.1 x 10^-12
[Ag+] = 2.5 x 10^-4 M
Since the stoichiometric coefficient of silver ion (Ag+) is 2, we can substitute the given value into the Ksp expression:
1.1 x 10^-12 = (2.5 x 10^-4)^2 [CrO42-]
Rearranging the equation for [CrO42-]:
[CrO42-] = (1.1 x 10^-12) / (2.5 x 10^-4)^2
Calculating the value:
[CrO42-] = 1.1 x 10^-12 / (2.5 x 10^-4)^2
[CrO42-] ≈ 1.76 x 10^-5 M
Therefore, the chromate ion concentration in a saturated solution of silver chromate is approximately 1.76 x 10^-5 M.
To find the chromate ion concentration in a saturated solution of silver chromate, we can use the concept of solubility product constant (Ksp) and the balanced equation of the dissociation of silver chromate.
The balanced equation for the dissociation of silver chromate (Ag2CrO4) is:
Ag2CrO4 ⇌ 2 Ag+ + CrO4^2-
The Ksp expression for this dissociation is:
Ksp = [Ag+]^2[CrO4^2-]
Given that the Ksp value of silver chromate is reported to be 1.1 x 10^-12, and the silver ion concentration ([Ag+]) is found to be 2.5 x 10^-4 M, we can substitute these values into the Ksp expression:
1.1 x 10^-12 = (2.5 x 10^-4)^2[CrO4^2-]
Now, let's solve for [CrO4^2-]:
[CrO4^2-] = (1.1 x 10^-12) / (2.5 x 10^-4)^2
Calculating this expression:
[CrO4^2-] ≈ 1.76 x 10^-5 M
Therefore, the chromate ion concentration in the saturated solution of silver chromate is approximately 1.76 x 10^-5 M.