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Electrochemistry Formulas - Gibbs Free Energy, Equilibrium K, Cell Potential, Nernst Equation

Question 10

What is the relationship between the electric potential at two points and the voltage between them?

A.Voltage = Electric potential at point A - Electric potential at point B

B.Voltage = Electric potential at point B - Electric potential at point A

C.Voltage = Electric potential at point A + Electric potential at point B

D.Voltage = Electric potential at point A / Electric potential at point B

Question 1

What is the formula to calculate the cell potential of a battery using standard reduction potentials?

A.E_cell = E_cathode - E_anode

B.E_cell = E_anode - E_cathode

C.E_cell = E_cathode + E_anode

D.E_cell = E_cathode / E_anode

Question 2

Why do we reverse the sign of the standard reduction potential for the anode?

A.Because the anode is always negative

B.Because oxidation occurs at the anode

C.Because reduction occurs at the anode

D.Because the anode gains electrons

Question 3

What happens when copper 2+ gains two electrons?

A.It turns into copper metal

B.It turns into zinc 2+

C.It loses two electrons

D.It becomes a battery

Question 4

What is the value of F in the equation ΔG = -nFE_cell?

A.96,4185 colums per mole of electrons transferred

B.96,4185 amps per mole of electrons transferred

C.96,4185 volts per mole of electrons transferred

D.96,4185 Joules per mole of electrons transferred

Question 5

How can you calculate ΔG if you know the equilibrium constant K?

A.ΔG = -RT Ln K

B.ΔG = RT Ln K

C.ΔG = -nFE_cell

D.ΔG = nFE_cell

Question 6

What is the formula to calculate the non-standard cell potential?

A.E_cell = E_cell^0 - 0.0591 log Q/n

B.E_cell = E_cell^0 - 0.0591 log Q

C.E_cell = E_cell^0 - 0.0591 Q/n

D.E_cell = E_cell^0 + 0.0591 log Q/n

Question 7

What is the unit of electric potential?

A.Joule

B.Coulomb

C.Ampere

D.Volt

Question 8

What is the formula to calculate the work done by a charge?

A.Work = Charge x Voltage

B.Work = Current x Time

C.Work = Power x Time

D.Work = Force x Distance

Question 9

How is voltage defined?

A.The work per unit of charge

B.The rate of flow of electric charge

C.The force per unit of charge

D.The power per unit of charge