Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and the Yahoo Answers website is now in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Le Chatelier's Principle Question?
This is what I wrote for a chemistry lab exam is it right? If not, where are the mistakes?
Main equilibrium: CrO4[2-] + H[+] <-> H2CrO4
Stress A: Add BaCl2
Secondary Eqm: H[+] + Cl[-] -> HCl
The equilibrium will shift to the left to produce the H+ ions.
Stress B: Add NaOH to the same well (meaning to the main eqm, add BaCl2 first and then add NaOH to that)
CrO4 + H <-> H2CrO4
H + Cl -> HCl
NaOH + H2CrO4 <-> H2O + Na2CrO4
As the H2CrO4 is used up, the eqm will shift towards the right.
I'm pretty sure a lot is wrong, but what is and what are the correct answers?
1 Answer
- Anonymous1 decade agoFavorite Answer
Barium chromate percipitates out
BaCl2 added
makes Ba+2
Ba+2 + CrO4-2 ---> BaCrO4
thus rnx shifts to right to make more CrO4-- to replace the ones percicpitated
-----
OH- neuttralizes H+
OH- + H+ --->H2O
thus adding OH- shifts rnx back to the left
Source(s): Soc