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T/C | A | B | C | D | E |
0 5 10 15 20 25 30 35 38 40 45 50 55 60 70 80 90 95 | 3.557 3.552 3.548 3.548 3.547 3.547 3.542 3.554 3.560 3.580 3.609 3.650 3.674 | 4.003 3.999 3.998 3.999 4.002 4.008 4.015 4.024 4.030 4.035 4.047 4.060 4.075 4.091 4.126 4.164 4.205 4.227 | 6.984 6.951 6.923 6.900 6.881 6.865 6.853 6.844 6.840 6.838 6.834 6.833 6.834 6.836 6.845 6.859 6.877 6.886 | 7.534 7.500 7.472 7.448 7.429 7.413 7.400 7.389 7.384 7.380 7.373 7.367 | 9.464 9.395 9.332 9.276 9.225 9.180 9.139 9.102 9.081 9.068 9.038 9.011 8.985 8.962 8.921 8.885 8.850 8.833 |
The compositions of these standard solutions are:
A: Potassium hydrogen tartrate (saturated at 25℃)
B: Potassium hydrogen phthalate, m = 0.05 mol kg⁻¹
C: Potassium dihydrogen phosphate, m = 0.025 mol kg⁻¹
D: Disodium hydrogen phosphate, m = 0.025 mol kg⁻¹
D: Potassium dihydrogen phosphate, m = 0.008695 mol kg⁻¹
Disodium hydrogen phosphate, m = 0.03043 mol kg⁻¹
E: Borax, m = 0.01 mol kg⁻¹
Here, m represents the molality of the solute, and the solvent is water.
