Monday
March 30, 2015

Homework Help: Chemistry...please help

Posted by Kaili on Friday, March 9, 2012 at 7:59pm.

A galvanic cell is based on the following half-reactions:
Fe2+ + 2e- --> Fe(s) E= 0.440 V
2H+ + 2e- --> H2(g) E= 0.000 V
where the iron compartment contains an iron electrode and [Fe2+] = 1.00 x 10-3 M and the hydrogen compartment contains a platinum electrode, PH2 = 1.00 atm, and a weak acid HA at an initial concentration of 1.00 M. If the observed cell potential is 0.258 V at 25 degrees C, calculate the Ka value for the weak acid HA
-----------------------------------
I calculated Q from the nernst equation and got 4.45 X 10^-3 but i go from here/how do i get the Ka from this

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Chemistry - Little confusing!! I need help PLZ!!! Two half cells in a galvanic ...
chemistry - I posted this que before but got no answers pls help me :( A voltaic...
chemisry - Two half cells in a galvanic cell consist of one iron electroide in a...
chemistry - a galvanic cell: A copper electrode is placed in a Cu(NO3)2 ...
electric chem - A voltaic cell is made by placing an iron electrode in a ...
chemistry (electrochemistry) - 1) For the following electrochemical cell Cu(s)|...
grade 12 chemisstry - I have no idea what I'm doing here, please help. 2 half ...
AP CHEMISTRY - A solution is prepared in which a trace or small amount of Fe2+ ...
Chemistry - Im having trouble on a question Im not sure what it is they are ...
AP CHEMISTRY - A solution is prepared in which a trace or small amount of Fe2+ ...

Members