General chemistry 12: electrochemistry

In an electrochemical cell, an anode attracts [anions or cations] and is always the site of [oxidation or reduction]

anions

oxidation

In an electrochemical cell, a cathode attracts [anions or cations] and is always the site of [oxidation or reduction]

cations

reduction

In an electrochemical cell, electrons flow from the [anode or cathode] to the [anode or cathode]

anode; cathode

In an electrochemical cell, current flows from the [anode or cathode] to the [anode or cathode]

cathode to the anode

Galvanic cells are also known as [...]

voltaic cells

Galvanic cells house [spontaneous or non-spontaneous] reactions

spontaneous

Electrolytic cells house [spontaneous or non-spontaneous]reactions

non-spontaneous

A/an [...] is an electrolytic cell that is comprised of two half-cells with the same electrodes, but differing in concentrations

concentration cell

[...] is a measure of the tendency of a chemical species gain electrons and be reduced

reduction potential

• a more positive E_red indicates a greater tendency to be reduced

The [...] is the tendency for a chemical species to be reduced, and is measured in volts at standard conditions

standard reduction potential

The [...] is the maximum potential difference between two electrodes of a galvanic or voltaic cell

electromotive force (EMF)

• also known as the cell potential

Complete the above table with the signs (+, -, or 0) for each type of electrochemical cell

Give the equation for the cell potential (electromotive force) of an electrochemical cell:

Give the equation for the change in Gibbs free energy during a REDOX reaction as a function of standard cell potential:

n=number of moles of electrons transferred

F= faraday constant = 96485 c/mol

Ecell= standard cell potential

ive the equation for the change in Gibbs free energy in a REDOX reaction as a function of K_eq and in standard conditions:

Give the equation for the change in Gibbs free energy in a REDOX reaction as a function of K_eq and in non-standard conditions:

Give the Nernst equation:

he Nernst equation is used to calculate cell potential in non-standard conditions

E_cell = cell potential

Eº_cell = standard cell potential

R = universal Gas Constant, 8.31j/kmol

T = temperature in Kelvin

n = number of moles of electrons transferred

F = Faraday's constant = 96485 c/mol`

Q = reaction quotient (equals K if reaction is at equilibrium)

MILEDOWN::GENERAL_CHEMISTRY::ELECTROCHEMISTRY

Give the Nernst equation with the constants simplified to a single value:

At the equivalence point, a solution of weak acid and strong base will have a pH [ <, >, or = ] 7

> 7

At the equivalence point, a solution with strong acid and strong base will have a pH [ <, >, or = ] 7

= 7

At the equivalence point, a solution with strong acid and weak base will have a pH [ <, >, =] 7

<7

A/an solvent is a liquid that dissolves a solid, liquid or gaseous [...]

solute