Consider the chemical equilibrium of the following reaction ch3cooh    ch3coo– (aq) + h+(aq) what will happen to the chemical equilibrium of the solution if ch3coona is added? the equilibrium will shifts to the right. the equilibrium will shifts to the left. the equilibrium will be unaffected. the equilibrium will be lost.

The equilibrium will shifts to the left.

Explanation:

Any change in the equilibrium is studied on the basis of Le-Chatelier's principle.

This principle states that if there is any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.

Thus if is added it will dissociate to give and

Thus as the concentration of increases, the equilibrium will shift in a direction where concentration of decrease i.e. the dissociation of will be further depressed i.e the equilibrium will shift to the left.

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-