Question

Find the equilbrium expression (Ka) for the ionization reaction. HCO3-(aq) + H2O(l) ⇆H3O+(aq) + CO32-(aq) Give the expressions for A, B, and C, given the form:

Answer 1

Answer:

$equilibruim constant = \frac{[C] . [D] }{[A] }$

Explanation:

HCO₃⁻(aq) + H₂O(l) ⇆ H₃O⁺(aq) + CO₃⁻²(aq)

if we rewrite using letters

A(aq) + B(l) ⇆ C(aq) + D(aq)

when in aqueous solution, the concentration of the water is not included in the expression of the equilibrium constant because it is assumed constant.

$equilibruim constant = \frac{[C] . [D] }{[A] }$

Notice that,  all the stoichiometric coefficients are equal to 1.