When considering free energy change, biochemists define a biochemical standard state, ? g�\', which differs from the chemical standard state, ? g�. a similar distinction must be made with reduction potentials.

(a) in contrast to the chemical reduction potential, ? e�, the biochemical standard reduction potential, ? e�\'

- specifies a ph of 7

- specifies 1 atm

- specifies a hydrogen ion concentration of 1m

- specifies 1m reductant

- specifies a temperature of 25 �c

(b) why might the standard reduction potential for a reaction differ from the reduction potential found in a cell?

- concentration in the cell might not be 1m

- the value of r is constant

- the number of electrons transferred might not be the same in the cell

- the value of ? can differ in the cell.