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Zepler [3.9K]
3 years ago
12

chromate is sparingly soluble in aqueous solutions. The Ksp of Ag2CrO4 is 1.12×10−12 . What is the solubility (in mol/L) of silv

er chromate in 1.00 M potassium chromate aqueous solution?
Chemistry
1 answer:
zavuch27 [327]3 years ago
3 0

Answer:

6.5X10^-^5~\frac{mol}{L}

Explanation:

For this question, we have to start with the <u>ionization equation</u> for Ag_2CrO_4_(_s_), so:

Ag_2CrO_4_(_s_)~~2Ag^+~_(_a_q_)~+~CrO_4^-^2_(_a_q_)

With this in mind we can write the <u>Ksp expression</u>:

Kps~=~[Ag^+]^2[CrO_4^-^2]

Additionally, for every mole of CrO_4^-^2  formed, 2 moles of Ag^+ are formed. We can use <u>"X"</u> for the unknown concentration of each ion, so:

[CrO_4^-^2]~=~X  and  [Ag^+]~=~2X

Now, we can <u>plug the values</u> into the Ksp expression:

1.12x10^-^1^2~=~(2X)^2(X)

Now we can <u>solve for "X"</u> :

1.12x10^-^1^2~=~4X^3

X^3=\frac{1.12X10^-^1^2~}{4}

X=(\frac{1.12X10^-^1^2~}{4})^(^1^/^3^)

X=6.5X10^-^5~\frac{mol}{L}

I hope it helps!

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