Write the ka expression for h2po4− in water. click in the answer box to activate the palette.

Balanced chemical reaction: H₂PO₄⁻(aq) + H₂O(l) ⇄ HPO₄²⁻(aq) + H₃O⁺(aq).
or H₂PO₄⁻(aq) ⇄ HPO₄²⁻(aq) + H⁺(aq).
Ka is the acid dissociation constant, which quantifies the extent of acid dissociation (in this example H₂PO₄⁻) in water.
Ka = [HPO₄²⁻]·[H₃O⁺] / [H₂PO₄⁻].
or Ka = [HPO₄²⁻]·[H⁺] / [H₂PO₄⁻].

Answerit curves up and levels out.explanationwe assume that the container contains absolutely no ammonia to begin with as it states that "nitrogen gas and hydrogen gas" react to "produce ammonia."at dynamic equilibrium, the product and reactant concentrations are equal.this means that, starting from a concentration of zero, [nh₃] must curve "up" from zero and then level out to a constant concentration.