December 03, 2020, 09:09:34 PM
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### Topic: Chemistry  (Read 193 times)

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#### Maybeelectric

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##### Chemistry
« 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

#### sjb

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##### Electrochemistry and equilibrium
« Reply #1 on: October 05, 2020, 10:58:41 AM »
What is the E° value for a reaction at equilibrium?

#### mjc123

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##### Re: Chemistry
« Reply #2 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?