pH table for Potassium and Sodium Phosphate Buffers

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
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