Which would precipitate first? AgCl or AgBr ?

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Which would precipitate first? AgCl or AgBr ?

I'm assuming my calculations are correct and AgBr will precipitate first, but i'm not sure how to explain why? Or maybe i'm wrong :P

2007-03-11 10:57:58 · 2 answers · asked by NerdyAndrew 2 in Science & Mathematics ➔ Chemistry

2 answers

You're right, it's AgBr. The reason is AgBr has a lower solubility (Ksp) than AgCl.

2007-03-11 11:06:48 · answer #1 · answered by anonymous_20003 3 · 0⤊ 0⤋

You are coreect, but you would have to have the values of Ksp of AgCl and AgBr to demonstrate it. First you solve for [Ag+] is a saturated solution of AgCl. Next, you plug that value into [Ag+][Br-] = Ksp to demonstrate that there is enough [Ag+] to exceed the solubility product of AgBr.

2007-03-11 11:09:13 · answer #2 · answered by steve_geo1 7 · 0⤊ 1⤋