Quiz 2 Section M– 1 March 2012
(4) 1. A liquid reaction A + B C reached equilibrium in volume V (the 1quilibrium
is known and equal to K ). chis equilibrium mixture is diluted with the same solvent
total volume of V .
What will be the reaction quotient Q immeciately after the dilution, before the
reaction started shifting to the new equilibrium? Derive an expression for Q as a c
function of K c
V 1 and V .2
(6) 2. A weak base B is dissolved in water at a known concentration C . Base iBnization
Constant is known and equal to K . b The ion product of water is known an equal to
(K w [H 3 ][OH]).
What is pH of this solution? Derive and expression for pH as a function of K , C w b
and K b
Do not make any assumption about the degree of ionization. To simplify your
do not consider the contribution of water self-ionization.
3. Reaction A(g) + (B) C(g), H < 0
Is at equilibrium. Will the equilibrium shift and which way will I shift if one of the