Is the pH greater than, equal to, or less than 7 after the neutralization of each of the following pairs of acids and bases? (c) HBr and aniline (C6H5NH2)

Video transcript

Hey everyone where passes the ph of the solution at the equivalence point, acidic neutral or basic for the following acid based hydration. And we have di ethyl amine and hydrochloric acid. Now, as we've learned, the equivalence point is the point in the tight rations where all of the base has reacted with all of the acid. So first let's go ahead and write out our reaction. So we have di ethyl amine and this is going to react with hydrochloric acid. Now, when these two react, we end up with the pro donated version of di ethyl amine plus our chlorine ion. Now we know the hydrochloric acid lionizes completely so we can go ahead and remove our spectator ion, which would be our chlorine ion from the equation. Rewriting this out, we would get our di ethyl amine plus our proton and this will get us to the pro donated version of di ethyl amine. Now, at the equivalence point we have our pro native version of di ethyl amine and our chlorine ions present in the solution. Our chlorine ion is the conjugate base of a strong acid and conjugate bases of strong acids are not basic And as we know, amines are weak bases and their conjugate acids. The ammonium ions are acidic in nature. So since our pro native version of di ethyl amine is acidic, this means at the equivalence point, the ph of the solution is acidic. Now I hope that made sense. And let us know if you have any questions