1. Find the pH values ​​of the following solutions of acids, bases, salts and buffer solutions.
Acid solution Base solution Salt solution Buffer solution:
0.020 M HClO 0.0075 M Ca(OH)2 0.300 M Na2C2O4 25 ml 0.050 M NH4OH 25 ml
Ka = 3.7 * 10-8 Ka2 = 5.4 * 10-5 0.10 M NH4Cl Kb = 1.8 * 10-5

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