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Consider the following equilibrium for nitrous acid, HNO2, a weak acid: HNO2(aq) + H2O (l) —><— H3O+ (aq) +NO2^-(aq) In which direction will the equilibrium shift if The acid solution is made more dilute?

Answer :

When the acid is Diluted more number of Hydronium ions are produced.

Explanation:

  • The equilibrium will shift in backward direction as nitrous acid [tex]HNO_2[/tex]  is weaker acid and have less tendency to dissociate in water.
  • Hence, formation of reactants will be more favourable  than the formation of products.
  • When the acid is more diluted more number of hydronium ions are produced hence the direction of equilibrium will shift to forward direction.

The equilibrium will shift towards forward direction.

[tex]HNO_2(aq)+ H_2O(l)[/tex] ⇄ [tex]H_3O^+(aq)+NO_2^-(aq)[/tex]

Equilibrium:

  • The equilibrium will shift in backward direction as nitrous acid is weaker acid and have less tendency to dissociate in water.
  • Hence, formation of reactants will be more favorable than the formation of products.
  • When the acid is more diluted more number of hydronium ions are produced.

Thus, the direction of equilibrium will shift to forward direction.

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