Textbook 6A #9

[Kailyn Missaghi]

Hi everyone, for #9 in this textbook question, it asks you which of the following can be classified as reactions between Bronsted acids and bases. I am kind of confused how to solve this problem. Would the bases just be those who have a H+ (have accepted a proton) and the acids be I- (have donated)?

[Lily Jiang 3K]

If a species gains a proton, it acts as a base. If a species loses a proton, it acts as an acid. For example, NH4+ can be an acid since it can donate H+ and NH3 can be a base since it accepts H+ so you are partially right. I- would be a base since it can accept H+.