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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: topell on April 13, 2005, 04:39:03 PM

Title: Concentration of H+ using voltage and M
Post by: topell on April 13, 2005, 04:39:03 PM

If the voltage of a Zn- H+ cell is 0.67V where the [Zn^+2]=1.25M and the PH2=1atm, what is the concentration of H+?

I've tried 0.67V=-0763 -(0.0257/2)ln[(H+)^2/(1.25M)(1.0atm)]

I can't get the ln part, where to solve for H+ with an exponent

Title: Re:Concentration of H+ using voltage and M
Post by: Donaldson Tan on April 14, 2005, 11:14:11 PM

ln (A/B) = ln A - ln B