Question

Which compound can act as both a Bronsted-Lowry acid and a Bronsted-Lowry base?

a. water
b. ammonia
c. sodium hydroxide
d. hydrochloric acid

Answer 1

The answer is A. Water

Bronsted-Lowry base compounds are those that can accept protons

Bronsted-Lowry Acid Compounds are those that can recieve one

Water / H2O is an Amphoteric compund which mean that its molecul can act as a Base and Acid compound, so the answer is A.