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gulaghasi [49]
3 years ago
7

What is the concentration of the silver ion in silver chromate, Ag₂CrO₄, if its solubility product constant (Kₛₚ) is 1.2 x 10⁻¹²

. Hint: write the equation first! *
2 points

1.4 x 10⁻⁵

1.1 x 10⁻⁹

1.6 x 10⁻¹²

2.4 x 10⁻¹²
Chemistry
1 answer:
viva [34]3 years ago
6 0

Answer:

[Ag^+]=1.3x10^{-4}M

Explanation:

Hello,

In this case, given the solubility product of silver chromate:

Ag_2CrO_4(S)\rightleftharpoons 2Ag^+(aq)+CrO_4^{-2}(aq)

Now, the law of mass action excluding silver chromate as it is solid, turns out:

Ksp=[Ag]^2[CrO_4^{-2}]

Thus, given the change x due to the dissolution of silver chromate, we obtain:

1.2x10^{-12}=(2x)^2\times x

Hence, we solve for x:

x=\sqrt[3]{\frac{1.2x10^{-12}}{2^2} } = 6.7x10^{-5}M

Thus, the concentration of silver ions will be:

[Ag^+]=2x=2*6.7x10^{-5}M=1.3x10^{-4}M

Best regards.

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