The equation below represents the equilibrium state of aqueous phosphoric acid. H3PO4(aq) ↔ H+(aq) + H2PO4-(aq)

Which of the following is equal to the ionization constant Ka?
A
[H2PO−4][H+][H3PO4]

B
[H+][H3PO4][H2PO4]

C
[H+][H2PO−4][H3PO4]

D
[H3PO4][H+][H2PO−4]

Cr(oh)3 -> cr(3+) + 3oh-

Answerd. may include all of these are many definitions of bases: the  brønsted-lowry definition of acids and bases says that bases are proton acceptors.the arrhenius definition of acids and bases says that bases increase [oh⁻] in solution (thereby producing oh⁻ ions)the lewis definition of acids and bases says that bases donate electron pairs.therefore, the sensible answer is that a base may include all of the described characteristics.