Biology Question- Action of buffer in response to pH increase in blood?

Question

One of the buffers that contribute to pH stability in human blood is carbonic acid H2CO3. Carbonic acid is a weak acid that dissociates when placed in aqueous solution dissociates into a bicarbonate ion (HCO3-) and a hydrogen ion (H+)

If the pH of the blood increases, one would expect

a. a decrease in the concentration of H2CO3 and an increase

in the concentration of H2O

b. an increase in the concentration of H2CO3 and a decrease

in the concentration of H2O

c. a decrease in the concentration of HCO3- and an increase

in the concentration of H2O

d. an increase in the concentration HCO3- and a decrease in

the concentration of H2O

e. a decrease in the concentration of HCO3- and an increase

in the concentration of both H2CO3 and H2O

I'm thinking it's e. Can anyone verify that for me? Please and thanks.

Answer 1

i think a

the eq is H2CO3 <--> HCO3- + H+

when pH increases that means there's less H+ in the blood, so the buffer tries to make more H+ to compensate for the change. So the reaction shifts to the right, H2CO3 decreases, H+ and HCO3- increase. Because the H+ increases,

H+ + OH- <--> H2O shifts to the right to compensate for the increases in H+. So H2O increases.