08. Solving a chemistry problem
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2. From the proposed list, exclude a solution whose pH cannot be measured with a glass electrode:
0.2 mol/l HAc, 0.2 mol/l NaCl, 0.2 mol/l NiSO4 2 mol/l HF, 0.2 mol/l HCl
0.2 mol/l HAc, 0.2 mol/l NaCl, 0.2 mol/l NiSO4 2 mol/l HF, 0.2 mol/l HCl
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