CHEM
Test 3 SuII 2015_VerA

A 200 ml sample of 050 m h 3 aso 3 arsenous acid a

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6. A 20.0 mL sample of 0.50 M H 3 AsO 3 (arsenous acid, a polyprotic acid) was titrated with 0.33 M NaOH. The following data were gathered during the titration. mL NaOH added 0.00 15.00 30.00 45.00 pH 4.95 9.20 11.25 11.69 What is K a1 for arsenous acid? ___
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