pH table for Potassium phosphate buffer at 25°C
pH |
% K2HPO4 (dibasic) |
% KH2PO4 (monobasic) |
5.8 | 8.5 | 91.5 |
6.0 | 13.2 | 86.8 |
6.2 | 19.2 | 80.8 |
6.4 | 27.8 | 72.2 |
6.6 | 38.1 | 61.9 |
6.8 | 49.7 | 50.3 |
7.0 | 61.5 | 38.5 |
7.2 | 71.7 | 28.3 |
7.4 | 80.2 | 19.8 |
7.6 | 86.6 | 13.4 |
7.8 | 90.8 | 9.2 |
8.0 | 94.0 | 6.0 |
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pH table for Sodium phosphate buffer at 25°C
pH |
% Na2HPO4 (dibasic) |
% NaH2PO4 (monobasic) |
5.7 | 6.5 | 93.5 |
5.8 | 8.0 | 92.0 |
5.9 | 10.0 | 90.0 |
6.0 | 12.3 | 87.7 |
6.1 | 15.0 | 85.0 |
6.2 | 18.5 | 81.5 |
6.3 | 22.5 | 77.5 |
6.4 | 26.5 | 73.5 |
6.5 | 31.5 | 68.5 |
6.6 | 37.5 | 62.5 |
6.7 | 43.5 | 56.5 |
6.8 | 49.0 | 51.0 |
6.9 | 55.0 | 45.0 |
7.0 | 61.0 | 39.0 |
7.1 | 67.0 | 33.0 |
7.2 | 72.0 | 28.0 |
7.3 | 77.0 | 23.0 |
7.4 | 81.0 | 19.0 |
7.5 | 84.0 | 16.0 |
7.6 | 87.0 | 13.0 |
7.7 | 89.5 | 10.5 |
7.8 | 91.5 | 8.5 |
8.0 | 94.7 | 5.3 |
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