[Superfrog]

New here, and having a tough time with the following question:

What is the solubility in g/L of silver chromate (Ksp = 1.2*10^-12), M.W=331.73 g/mol) in 0.79126M silver nitrate.  

I know the answer is 6.36 * 10^-10, but I can't get the right answer in my calculations.  

Help here would be greatly appreciated

[jena]

Hi,

I found a website to help you figure out solubility. Hope it helps.

http://home.millsaps.edu/~lewisll/Ch16%20notes-2005-students.doc

[Borek]

Ksp = [Ag+]^2[CrO4(2-)]

[Ag+] is given as it is the same as the silver nitrate concentration. Substitute, solve for [CrO4(2-)] - you know molar concentration, you should be able to convert it to gram/L.

[GCT]

New here, and having a tough time with the following question:

What is the solubility in g/L of silver chromate (Ksp = 1.2*10^-12), M.W=331.73 g/mol) in 0.79126M silver nitrate.  

I know the answer is 6.36 * 10^-10, but I can't get the right answer in my calculations.  

Help here would be greatly appreciated

watch out for the common ion effect

first specify whether it's silver I or silver II
e.g. silver II

Ksp=(.791+x)x

solve for x, this will be the concentration of the compound which dissolved.  You'll need to convert from moles/L, to grams/L to obtain the final answer.

The answer will be different with silver I