Question

Which equilibrium system has HCO3- acting as a Brønsted-Lowry base?

HCO3- H+ + CO32-
HCO3- + HS- H2S + CO32-
HCO3- + H2S H2CO3 + HS-
HCO3- + H2O H3O+ + CO32-
HCO3- + O2- CO32- + OH-

Answer 1

C) HCO3- + H2S H2CO3 + HS-

Step-by-step explanation:

Edmentum

Answer 2

A Brønsted-Lowry base is a base is a proton acceptor.

In the only case where this is done is when HCO3- accepts a proton and becomes H2CO3.

In the other cases, HCO3- is donating a proton which makes it an acid.