Answer to Question #170492 in General Chemistry for Leila Marie

Question

H3PO4 (aq) ⇌ H + (aq) + H2PO4 - (aq)        Ka = 7.2 x 10 -3

Give the equilibrium constant expression for the reverse reaction.

Answer 1

The backward equilibrium costant

K_equilibrium=Con.H3Po4/con.H^+. con.H₃Po₄-

. =K_a/con.H^+. con.H₃Po₄-

. =7.2*10^-3 /con.H^+. con.H₃Po₄-