Question

Consider the hypothetical reaction which is at equilibrium:
A(aq) + B(s) ⇆ C(aq) + D(aq) ∆H<0
Indicate whether the concentration of the reactant A, [A], will increase, de-
crease or remain unchanged under the following changes effected upon the
equilibrium.

(1) A catalyst is added.
(2) Some C is removed from the
system.
(3) Some D is added to the system.
(4) The system is cooled.
(5) Some B is added to the system.

Answer 1

1- concentration of A will remain unchanged

2 - concentration of A will decrease

3- concentration of A will increase

4 - concentration of A will decrease

5- concentration of A will remain unchanged