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31 A 20 ml sample of a 0.2 M solution of the weak diprotic acid H2A is titrated with 0.25 M NaOH. Then molarity of solution at second equivalent point is: 1) 0.1 M NaHA 2) 0.153 M Na2A 3) 0.1 M Na2A 4) 0.0769 M Na2A |
| Answer» 31 A 20 ml sample of a 0.2 M solution of the weak diprotic acid H2A is titrated with 0.25 M NaOH. Then molarity of solution at second equivalent point is: 1) 0.1 M NaHA 2) 0.153 M Na2A 3) 0.1 M Na2A 4) 0.0769 M Na2A | |