M2 L2 Temperature on Buffer Solutions

Question 1

can pH be affected by changes in temp?

what others can influence a chemical equilibrium in buffer systems?

what principle is this

Answer 1

yes

temp, concentration, pressure

le chatlier’s principle

Question 2

what is the relation of pH to temp?

Answer 2

the dissociation constant, Ka, for the weak acid changes with temp resulting in small change in pH.. pK remains constant

Question 3

buffering effect can be stated as: if K is small, the buffering effect is (large/small) because there’s not much (A/HA)in solution

If the value of K increases with temperature, then the buffering effect is (stronger/weaker) at a higher temperature. If K decreases, then the buffering effect is (stronger/weaker) when it’s warmer.

Answer 3

small
HA

stronger
weaker