equilibrium: CH CH COOH ⇌ H+ + CH CH COO– 32 32
presence of buffer
DO NOT ALLOW HA and A– in this equilibrium expression
Added alkali
Equilibrium responses must refer back to a written equilibrium.
IF no equilibrium shown, use the equilibrium as written in expected answers (which is also written on page 6 of the paper)
CH3CH2COOH reacts with added alkali
ALLOW weak acid reacts with added alkali
ORCH CH COOH+OH– 32
OR added alkali reacts with H+ OR H+ + OH–
CH CH COO– OR Equilibrium right 32
Added acid
CH3CH2COO– reacts with added acid OR [H+] increases
ALLOW conjugate base reacts with added acid DO NOT ALLOW salt reacts with added acid
CH3CH2COOH OR Equilibrium left
can someone explain why it shifts left/right
I thought that when it reacts with x it would move in the direction of x to replace what has been lost? thanks