Question

9. Which of the following statements is true?

Choose all that apply.

a) A Brønsted-Lowry base is a proton donor.

b) All Arrhenius bases are also Brønsted-Lowry bases.

c) All Brønsted-Lowry bases are also Arrhenius bases.

d) The chemical formula of the conjugate acid of a Brønsted-Lowry base has one more proton than the Brønsted-Lowry base.

e) A Brønsted-Lowry acid is a proton acceptor.

Answer 1

• A Brønsted-Lowry acid is any species that is capable of donating a proton -H⁺

• A Brønsted-Lowry base is any species that is capable of accepting a proton, which requires a lone pair of electrons to bond to the -H⁺

• An Arrhenius acid is any species that increases the concentration of  -H^{+ in aqueous solution}

• An Arrhenius base is any species that increases the concentration of OH^- in aqueous solution

• From the definition we can see that

• All Arrhenius acids and bases are also Bronsted-Lowry acids and bases, but the opposite isn't true.

• option B,Cand D are correct