Chemical Forums

Chemistry Forums for Students => High School Chemistry Forum => Topic started by: cloud5 on November 01, 2010, 08:49:31 PM

Title: Mass of KOH
Post by: cloud5 on November 01, 2010, 08:49:31 PM

Please help me to check and correct my answer if I'm wrong.

The answer given is 0.60g but I got 0.434g.

http://img153.imageshack.us/i/q12yv.jpg
http://img100.imageshack.us/i/ansy.jpg

Title: Re: Mass of KOH
Post by: rabolisk on November 02, 2010, 01:06:49 AM

You assumed that H⁺ reacted with OH^- where OH^- was the limiting reactant. But then the remaining H⁺ would be in equilibrium with the HA, causing more HA to dissociate...

HF + OH^-  :rarrow: F^- + H₂O

Try to use the above hint.