Question

From the compounds i) nh3 ii) naoh iii) hcl identify the brønsted base(s). 1. i and iii only 2. ii and iii only 3. i and ii only 4. iii only 5. ii only

Answer 1

According to Bronsted-Lowry an acid is any species that is capable of donating a proton H+ while a base is any species that is capable of accepting a proton. In this case, both NH3 and NaOH can act as proton acceptors in a reaction. Therefore the correct answer is 3 (i and ii only)

Answer 2

Answer : The correct option is, (3) (i) and (ii) only

Explanation :

According to the Brønsted-Lowry concept is that, a substance is a Brønsted-acid if it can donate a proton or hydrogen ion, $(H^+)$ and a substance is a Brønsted-base if it can accept a proton or hydrogen ion, $(H^+)$.

In the given options, $NH_3$ and NaOH are Brønsted-base because they can accept a proton or hydrogen ion, $(H^+)$. While the other options are not a Brønsted-base because it can not accept a proton or hydrogen ion, $(H^+)$.

Hence, (i) $NH_3$ and $NaOH$ are Brønsted-base.