Homework Help: chemistry

Posted by Reindier on Friday, April 18, 2008 at 8:11pm.

What mass of Ag2CO3 would be found in 1.4 L of a saturated solution if the Ksp of Ag2CO3 is 8.2 x 10-12?

My Work:
SInce mass = number of mols x Molar mass, I first look for the molar mass of Ag2CO3, which is 275.75 g/mol. Multiplying .0000000000082 by 275.5 gives a value of 2.0 x 10^-9 g, which becomes the mass.

Is this correct?

chemistry - DrBob222, Friday, April 18, 2008 at 9:12pm
No. You haven't used Ksp at all except in a superficial manner. First you must determine the solubility of Ag2CO3. Use Ksp for that.
Ag2CO3 ==> 2Ag^+ + CO3^=

Ksp = (Ag^+)^2(CO3^=) = 8.2 x 10^-12
Solubility Ag2CO3 in mols/L = y
Then (Ag^+) = 2y
(CO3^=) = y
Now substitute those variables into Ksp expression.
(2y)^2(y) = 8.2 x 10^-12
solve for y which is (Ag2CO3)in mols/L.
Convert to grams by grams = mols x molar mass. That is the mass in 1 L.
Then that mass x 1.4 L/1.0 L = the mass of Ag2CO3 in 1.4 L. Post your work if you need additional assistance.

Answer this Question

Related Questions

chemistry - What mass of Ag2CO3 would be found in 1.4 L of a saturated solution ...
Chem 2 - what is the solubility of silver carbonate in water in 25 degrees ...
Chemistry - Which of the following will increase the molar solubiity of Ag2CO3...
chemistry - What is the concentration of silver(I) ion in a saturated solution ...
chemistry - What is the concentration of silver(I) ion in a saturated solution ...
Chemistry - Sorry, I didn't finish the question: Which of the following will...
Chemistry - A solution is 5.0× 10–5 M in each of these ions: Ag , ...
chemistry - What is the concentration of Ag+ remaining in solution? Calculate ...
Chemistry(Please check answer) - The Ksp values for three salts are given: AgCl...
chemistry - Calculate the solubility (in g/L) of silver carbonate in water at 25...

For Further Reading

First Name:
School Subject:
Answer: