Answer: A (acid is a proton donor)
Step-by-step explanation:
Bronsted-Lowry Definition
- Acids are proton (H⁺) donors.
- Example: HCl is a strong acid and it donates a proton to water when both are in a solution. Water is the base because it accepted the proton from water to form H₃O⁺.
- Bases are proton (H+) acceptors.
- Example: NH₃(aq) + H₂O(l) <--> NH₄⁺(aq) + OH⁻(aq). In this reaction, NH₃ is the base because it accepted the proton from water, and water is the acid because it donated a proton to NH₃.·
- Amphoteric means some substances act as an acid or base, depending on the reaction. Water is a good example of an amphoteric substance because it can donate or accept a proton.