Initially the value of Q has increased or decreased with the addition of KSCN or
ID: 1012197 • Letter: I
Question
Initially the value of Q has increased or decreased with the addition of KSCN or Fe(NO_3)_3? To cause the equilibrium to shift to the left, was there an increase or decrease in concentration of Fe^3 + due to the addition of OH? For the reaction system below, a state of equilibrium has been achieved stress had been placed on the system which resulted in a shift in the position of equilibrium. What stress had been imposed? heat + CuCl_2 (s) + 2NH_3 (g) Cu(NH_3)_2^2 + (aq) + 2Cl^- (aq) More of the solid formed. Was the system temperature increased or decreased? A large amount of bubbles formed. Was the amount of chloride ion increased or decreased? The solid dissolved. Was it due to the removal or addition of ammonia? If the mixture got warn, then was the concentration of NH_3 or Cl^- increase?Explanation / Answer
we know that
according to Le Chatlier principle
if there is change is applied to the equilibrium
then the equilibrium will shift in a direction which minimises the change
a)
consider the given reaction
heat + CuCl2 (s) + 2 NH3 (g) ---> Cu(NH3)2+2 + 2 Cl-
given
more solid ( CuCl2) is formed
now
if temperature is increased , that is more heat is added
according to Le Chatlier principle
the equilibrium will shift in a direction to reduce the heat
so it will move towards the products
in this case , more solid is used
So in the contrary
if the temperature is decreased ,
the equilibrium will shift in a direction to produced more heat
as a result
more of the solid will be formed
So
the answer is temperature is decreased
b)
large amount of bubbles formed
this is because of the formation of NH3 gas
so
the target is to get more NH3 gas
To get this result, amount of Cl- ions should be increased
because
according to Le Chatlier principle
the equilibrium will shift in a direction to reduce the Cl- ions,
So Cl- ions will be utilized and NH3 will be formed
So
the answer is amount of Chloride ions is increased
C)
similarly
When more NH3 is added
the equilibrium will shift in a direction to reduce the NH3
So the equilibrium will shift towards the products
as a result , the solid will dissolved
So
the answer is addition of ammonia
D)
mixture got warm , it means more heat is produced
it is due to the increase in Cl- concentration
the equilibrium will shift in a direction to reduce the Cl- concentration
So ,it will shift towards the reactants
as a result more heat is produced
So
the answer is increase in Cl- concentration