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142 solutions

The Nernst Equation

Q. Consider an electrochemical cell with a zinc electrode immersed in 1.0M Zn^2+ and a nickel electrode immersed in 0.10 M Ni^2+. Zn^2+ + 2e^-→Zn E° = -0.76 V Ni^2+ + 2e^-→Ni E° = -0.23 V Calculate the concentration of Ni2+ if the cell is allowed to run to equilibrium at 25°C.

Solved • Dec 4, 2019

The Nernst Equation

Q. A voltaic cell consists of a Cu^2+/Cu electrode (𝝴°red = 0.34v) and an Au^3+/Au electrode(𝝴°red=1.50V). Calculate [Au^3+] if [Ci^2+] = 1.20 M and 𝝴cell = 1.13V. a. 0.2 M b. 0.002 M c. 5.0 M d. 0.04 M e. 0.001 M

Solved • Dec 4, 2019

The Nernst Equation

Q. A voltaic cell is constructed with two Zn2+-Zn electrodes, where the half-reaction is Zn2+ + 2e− → Zn (s) E° = -0.763 V The concentrations of zinc ion in the two compartments are 4.50 M and 1.70 ⋅ 10^−2 M, respectively. The cell emf is ________ V. 0.143 0.0717 -202 -0.75

Solved • Dec 4, 2019

The Nernst Equation

Q. What is the value for the temperature, T, in kelvins? Express your answer to three significant figures and include the appropriate units. Consider the reaction Mg (s) + Fe2+ Mg2+ + Fe(s) at 85C where [Fe2+] = 3.30 M and [Mg2+] = 0.310 M

Solved • Dec 4, 2019

The Nernst Equation

Q. What is the value for the reaction quotient, Q, for the cell? Consider the reaction Mg (s) + Fe2+ Mg2+ + Fe(s) at 85C where [Fe2+] = 3.30 M and [Mg2+] = 0.310 M

Solved • Dec 4, 2019

The Nernst Equation

Q. Can the Nernst equation be used at temperatures other than room temperature? yes no

Solved • Dec 4, 2019

The Nernst Equation

Q. In the Nernst equation, what is the numerical value of the reaction quotient, Q, under standard conditions? Express your answer using one significant figure.

Solved • Dec 4, 2019