Question

When solid sodium bicarbonate is heated the following decomposition reaction occurs:

2NaHCO ₃(s) ⇌ Na ₂CO ₃(s) + H ₂O(g) + CO ₂(g)

In a closed container the reaction will reach equilibrium. If this reaction were at equilibrium, what effect would each of the following changes have on the reaction?

-       A.       B.       C.       D.	Some of the CO2 is selectively removed from the system.
-       A.       B.       C.       D.	Some solid Na2CO3 were added to the system.
-       A.       B.       C.       D.	Some solid NaHCO3 were removed from the system.
-       A.       B.       C.       D.	Some steam were added to the system.

A.	The reaction would shift towards reactants.
B.	The reaction would not be affected.
C.	No determination can be made regarding any change in the reaction.
D.	The reaction would shift towards products.

Answer 1

Ans :

According to Le Chatelier's principle ,when the reaction at equillibrium is subjected to change in reaction conditions , the reaction moves in a direction where the equillibrium can be re-estabilished again.

so here :

D The reaction would shift towards products : Some of the CO2 is selectively removed from the system.

A The reaction would shift towards reactants : Some solid Na2CO3 were added to the sytem.

A. The reaction would shift towards reactants : Some solid NaHCO3 were removed from the system.

A. The reaction would shift towards reactants : Some steam were added to the system.