Predict the products form from the fall reaction between propanoic acid and ammonia, right? So here this is our acid ammonia, which is a neutral nitrogen compound we know is our weak base. Now since both of these species are weak, we know that we have reversible arrows to show that in equilibrium has been established.

If you don't remember this, make sure you go back and take a look at my videos when we talk about reactions and equilibrium between acids and bases. So we know, following the Bronsted-Lowry definition of acids and bases, that the carboxylic acid gives away an H+ to the ammonia. It becomes a carboxylate anion. In the process, the ammonia gains an H+ to become the ammonium ion, so it becomes NH4+.

So although we're talking about an organic molecule in terms of carboxylic acid, this is kind of familiar because it follows our Bronsted-Lowry definitions of acids and bases. The acid donates an H+, the base accepts the H+ and in that way we make our two ions as products.