Homework Help: gen chem

Posted by Chem on Saturday, May 8, 2010 at 7:10pm.

if the voltage of the cell is 2.0898V at 25C when [Mg2+] = 0.1945M and the pressure of H2 = 1.00atm, what is the pH? E0=2.3700V

Mg(s)+2H+(aq)<--> Mg2+(aq)+ H2(g)

gen chem - DrBob222, Saturday, May 8, 2010 at 7:20pm
E_cell = E^o_cell -(0.0592/2)*log Q.

Substitute the values from the problem and solve for H^+ (a part of Q). Convert to pH.

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