# Chemistry

posted by .

Calculate delta G of the reaction at 25 degrees C: 2Au^3+ (aq) + 3Ni(s) <=> 2Au(s) + 3Ni^2+(aq)
Au3+ + 3e- ==> Au Eo = +1.50V
Ni2+ + 2e- ==> Ni Eo = -0.23 V
2Au3+ + 3Ni ==> 3Ni2+ + 2Au

The answer is -1.00 x 10^3 kJ
but i'm not getting that answer!!!!!!! please tell me what i'm substituting incorrectly.

Delta G = -nFE

= - (1 moles e-) (96,485 J/mol e-volt) (1.27 volts)

dG = -122,535.95 J = -122.53 kJ = -1.22 x 10^2 kJ
UGHH

• Chemistry -

n = 6 (Balance the two half equations--one oxdn and the other redn-- to see you must multiply each half equation by 2 and 3 respectively which gives six total electrons transferred.)
F = 96,485 which you have.

E = 1.50+0.23 = 1.73 (You add the oxidn half to the redn half OR Ecell = E1-E2 = 1.50 - (-0.23) = ?
Answer is in joules. Change to kJ.

• Chemistry -

got it! thanks!

• Chemistry -

none of these are right fu

## Similar Questions

1. ### physics

The classify the as synthesis, decomposition, Single replacement. Double replacement. 2 Al +3NiBr2. 2AlBr3+3Ni
2. ### chemistry

Calculate the standard free-energy change for the following reaction at 25 °C. 2Au^3+(aq) + 3Ni(s) -->2Au(s) + 3Ni^2+(aq)
3. ### chemistry

My professor never teach us this kind of question before. I don't know why she put this question as a homework since she doesn't teach us this yet. I need help with one question. I don't know where to start. So don't you mind if you …
4. ### Chemistry

Calculate the standard free-energy change for the following reaction at 25 C degrees. 2Au^3+(aq)+3Ni(s) <-- --> 2Au(s)+3Ni^2+(aq) Ni2+(aq) + 2e¨C ¡ú Ni(s) E=¨C0.26 Au3+(aq) + 3e¨C ¡ú Au(s) E=+1.498 G= ?
5. ### Chemistry

Calculate the standard free-energy change for the following reaction at 25 C degrees. 2Au^3+(aq)+3Ni(s) <-- --> 2Au(s)+3Ni^2+(aq) Ni2+(aq) + 2e- -> Ni(s) E=-0.26 Au3+(aq) + 3e- -> Au(s) E=+1.498 G= ?
6. ### Chemistry Question

Calculate the ∆G˚ for the oxidation of nickel in the following balanced reaction. 2[RhCl6]3-(aq)+ 3Ni a 2Rh(s) + 3NiCl2(aq) + 6Cl-(aq) E˚ for RhCl6 is 0.5V E˚ for Ni(s) is -0.25V
7. ### General Chemistry

The problem is: Calculate the standard free-energy change for the following reaction at 25 degrees Celsius. 2Au^+3(aq) + 3Cr(s)-> 2Au(s) + 3Cr^+2(aq) I worked it out, getting half reaction: Au^3+ + 3e- -> Au; E = 1.498 Cr^3+ …
8. ### Chemistry

The problem is: Calculate the standard free-energy change for the following reaction at 25 degrees Celsius. 2Au^+3(aq) + 3Cr(s)-> 2Au(s) + 3Cr^+2(aq) I worked it out, getting half reaction: Au^3+ + 3e- -> Au; E = 1.498 Cr^3+ …
9. ### Chemistry

Calculate the standard free-energy change for the following reaction at 25 °C. Standard reduction potentials can be found here. 2Au(3+) + 3Cr-->2Au+3Cr(2+)
10. ### Chemistry

Calculate the standard free-energy change for the following reaction at 25 °C. Standard reduction potentials can be found here. 2Au^3+(aq) + 3Cr(s) <-----> 2Au(s) + 3Cr^2-(aq)

More Similar Questions