Sodium Acetate
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SODIUM ACETATE; PH 3.6–5.6, PKA = 4.76[edit] | ||
| Mix 0.1N acetic acid and 0.1M sodium acetate (Pearse, 1980). | ||
| acetic acid | sodium acetate | pH |
| 185 | 15 | 3.6 |
| 176 | 24 | 3.8 |
| 164 | 36 | 4 |
| 147 | 53 | 4.2 |
| 126 | 74 | 4.4 |
| 102 | 98 | 4.6 |
| 80 | 120 | 4.8 |
| 59 | 141 | 5 |
| 42 | 158 | 5.2 |
| 29 | 171 | 5.4 |
| 19 | 181 | 5.6 |
0.1 M NaOAc: 8.2 g/L, water to 1 L
0.1 N HOAC: 5.8 ml/L, water to 1 L, 0.58 ml/100 ml, 58 ul/10 ml, 116 ul/20 ml
2 g of NaOAc + 116 ul HOAC---> 1L, will be pH ~5.5, 20 mM
Mix 295 ml of 0.1 N HOAc and 705 ml of 0.1M NaOAC--> pH5.0
Sodium Acetate – Acetic Acid Buffer Solutions, pH 3.7–5.61
[edit]
Sodium acetate trihydrate, CH 3COONa • 3H 2O, M. wt. 136.09;
0.2M-solution contains 27.22 g/l.
x ml 0.2M-NaOAc and y ml 0.2M-HOAc mixed.
| pH, 18 °C | x ml 0.2M-NaOAc | y ml 0.2M-HOAc |
| 3.7 | 10.0 | 90.0 |
| 3.8 | 12.0 | 88.0 |
| 4.0 | 18.0 | 82.0 |
| 4.2 | 26.5 | 73.5 |
| 4.4 | 37.0 | 63.0 |
| 4.6 | 49.0 | 51.0 |
| 4.8 | 59.0 | 41.0 |
| 5.0 | 70.0 | 30.0 |
| 5.2 | 79.0 | 21.0 |
| 5.4 | 86.0 | 14.0 |
| 5.6 | 91.0 | 9.0 |