Question

In the following acid-base reaction, CH3NH3 is the CH3NH2(g) H2O(l) → CH3NH3(aq) OH¯(aq). Which is the Bronsted-Lowry acid?

Option a: CH3NH2
Option b: H2O
Option c: CH3NH3
Option d: OH¯

Answer 1

In the given reaction, H2O donates a proton to CH3NH2, making it the Brønsted-Lowry acid.

Step-by-step explanation:

In the acid-base reaction CH3NH2(g) + H2O(l) → CH3NH3(aq) + OH¯(aq), the Brønsted-Lowry acid is the species that donates a proton (H+). In this case, H2O acts as the Brønsted-Lowry acid because it donates a proton to CH3NH2, forming OH¯ and CH3NH3+, the conjugate acid. Hence, the correct option is b: H2O.