The ka expression for an aqueous solution of nitrous acid is
[tex]Ka = \dfrac{ [NO_2^-][H^+] }{[HNO_2}[/tex]
What is ka expression?
The acid dissociation constant is the equilibrium constant of an acid's dissociation reaction.
It is denoted by ka.
The equation is
[tex]HNO_2(aq) = H^+(aq) + NO_2^-(aq).[/tex]
Ka = The dissociation constant of acid
[HNO₂] = equilibrium concentration of nitrous acid.
[NO₂⁻] = equilibrium concentration of nitrite anions.
[H⁺] = equilibrium concentration of hydrogen cations.
Thus, the ka expression is [tex]Ka = \dfrac{ [NO_2^-][H^+] }{[HNO_2}[/tex]
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