CHEM 104 Lecture Notes - Lecture 24: Titration, Equivalence Point, Buffer Solution
Document Summary
Chem104 lecture 24 strong acid strong base buffers and titrations. Calculating the ph of a buffer solution after adding strong base (or strong acid) When a strong acid or strong base is added to a buffer, setup a mole table and do the reaction first. Strong acid + strong base (cid:2869)(cid:2869)=(cid:2870)(cid:2870) ( is very large) Reactions of buffers (strong acid or strong base) It consists of mainly two parts, stated as follows. Part 1: the reaction goes to completion and the calculation is done in moles with a salt . Change finish (scf: write reaction (strong acid + weak base or strong base + weak acid, scf table with moles; goes to 100% completion. Part 2: after the rea(cid:272)tio(cid:374) is (cid:272)o(cid:373)plete, the (cid:271)uffer"s (cid:374)u(cid:373)(cid:271)er of (cid:373)oles is (cid:272)ha(cid:374)ges due to the acid/base reaction: the ph is determined using henderson hasselbach equation. Buffer requirements: weak acid and base, conjugate pairs, 1:10 ratio.
