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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: Maybeelectric on October 05, 2020, 08:19:39 AM

Title: Chemistry
Post by: Maybeelectric on October 05, 2020, 08:19:39 AM

1. Consider the reaction at 25 degrees Celsius
2NO^3-(aq) + 8H^+(aq) + 3Cu(s) → 3Cu^2+(aq) + 2NO(g) + 4H2O(l)

(b) Is the reaction spontaneous at pH = 3 with all other ionic species at 0.01 M and
gases at 1 atm?

E=0.625-0.0257/6 ln (1^2 * 0.01^3/0.01^2 * (1x10^-6)) = 0.526v Spontaneous

(c) Is the reaction spontaneous at pH = 6 with all other ionic species at 0.01 M and
gases at 1 atm?

E=0.625-0.0257/6 ln (1^2 * 0.01^3/0.01^2 * (1x10^-3)) =0.408 v Spontaneous

(d) At what pH is the reaction at equilibrium with all other ionic species at 0.01 M
and gases at 1 atm?


I have no clue what the question D means
is the pH 2?, I'm confuse what equilibrium is the question talking about

Title: Electrochemistry and equilibrium
Post by: sjb on October 05, 2020, 10:58:41 AM

What is the E° value for a reaction at equilibrium?

Title: Re: Chemistry
Post by: mjc123 on October 05, 2020, 03:23:54 PM

Where do the factors 1x10^-6 and 1x10^-3 come from in your equations? Where is [H⁺]⁸?