Question

Which equilibrium reaction will experience a shift towards the products in equilibrium position when the concentration of Ni2+ is increased? View Available Hint(s) Which equilibrium reaction will experience a shift towards the products in equilibrium position when the concentration of is increased? Ni(OH)2(s)⇌Ni2+(aq)+2OH−(aq) [Ni(H2O)6]2+(aq)+3en(aq)⇌[Ni(en)3]2+(aq)+6NH3(aq) Ni2+(aq)+6NH3(aq)⇌[Ni(NH3)6]2+ NiS(s)⇌Ni2+(aq)+S2−(aq)

Answer 1

Explanation:

According to Le Chatelier's principle, any disturbance occurring in an equilibrium reaction will shift the equilibrium in a direction that will oppose the change.

As the given reactions are as follows.

•  $Ni(OH)_{2}(s) \rightleftharpoons Ni^{2+}(aq) + 2OH^{-}(aq)$

When concentration of $Ni^{2+}$ is increased in this reaction then reaction will shift in a direction that will be opposing the change. This means that the reaction will shift in backward direction.

• $[Ni(H_{2}O)_{6}]^{2+}(aq) + 3en(aq) \rightleftharpoons [Ni(en)_{3}]^{2+}(aq) + 6NH_{3}(aq)$

In this reaction, both water and ethylenediamine are neutral molecules. Hence, charge on nickel on each side will be equal to +2. Therefore, reaction will remain in equilibrium.

• $[Ni^{2+}(aq) + 6NH_{3}(aq) \rightleftharpoons [Ni(NH_{3})_{6}]^{2+}(aq)$

When we increase the concentration of $Ni^{2+}$ then equilibrium reaction will shift in the forward direction.

• $[NiS(aq) \rightleftharpoons Ni^{2+}(aq) + S^{2-}(aq)$

Here, on increasing the concentration of $Ni^{2+}$ will shift the equilibrium in backward direction.

Thus, we can conclude that out of the given options $[Ni^{2+}(aq) + 6NH_{3}(aq) \rightleftharpoons [Ni(NH_{3})_{6}]^{2+}(aq)$ is the chemical reaction in which equilibrium reaction will experience a shift towards the products in equilibrium position when the concentration of $Ni^{2+}$ is increased.