文档介绍：BUFFER SOLUTION
缓冲溶液的配制和性质
1
OBJECTIVE
1. 掌握缓冲溶液的配制方法性质
2. 了解酸度计使用原理方法
2
PRINCIPLE
a weak acid + its conjugate
(acetic acid and sodium acetate)
a weak base + its conjugate
(ammonia and ammonium chloride)
or
Buffer solution
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3
Henderson–Hasselbalch
property
resist the effect of acid and base 、concentration and dilution
4
pH = pHs +
(E - Es) F
玻璃电极甘***电极
glass electrode calomel electrode
pH meters
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5
PROCEDURE
1. C (HAc+Ac-)= pH= 的醋酸缓冲溶液的
配制
C (NaAc) =
C (HCl) =
加H2O稀释
定容
摇匀
6
容量瓶 volumetric flask
吸量管 graduated pipet
移液管 volumetric pipet
7
移液管的使用
2. 吸取
×
3. 放出
1. 润洗
8
读数
9
容量瓶的使用
4 定容混匀
1 检漏
1800
2 转移
3 旋摇
10