BÀI GIẢNG HÓA PHÂN TÍCH TS. GVC. HOÀNG THỊ HUỆ AN
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Ví dụ : Vẽ đường định phân khi chuẩn độ 100 ml dung dịch CH 3 COOH<br />
0,1 M bằng NaOH 0,1 M. Cho : pK CH3COOH = 4,75<br />
Giải :<br />
V NaOH (ml)<br />
F<br />
pH<br />
pH<br />
14<br />
0<br />
50<br />
90<br />
0<br />
0,5<br />
0,9<br />
2,88<br />
4,75<br />
5,70<br />
12<br />
10<br />
99<br />
99,9<br />
100<br />
100,1<br />
101<br />
0,99<br />
0,999<br />
1<br />
1,001<br />
1.01<br />
6,75<br />
7,75<br />
8,72<br />
9,70<br />
10,70<br />
8<br />
6<br />
4<br />
2<br />
∆pH đp<br />
= 7,75- 9,70<br />
110<br />
150<br />
1,1<br />
1,5<br />
11,68<br />
12,30<br />
0<br />
0 0.5 1 1.5 2 F
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