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Arsenious acid is a weak acid: HAsO2<-> H++AsO2- pKa=9.22 If 10-3 moles of the herbicide NaAsO2 are added to...

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Chemistry

Arsenious acid is a weak acid:

HAsO2<->H++AsO2- pKa=9.22

If 10-3 moles of the herbicide NaAsO2 areadded to 1 liter of water at 25 degrees Celsius, what is theresulting pH? Determine your answer algebraically using appropriateassumptions or using iterative calculations in a spreadsheet.

Answer & Explanation Solved by verified expert
4.4 Ratings (944 Votes)
As a salt NaAsO2 is a strong electrolyte completely dissociated c AsO2 1x103 M in this solution AsO2 is a weak base and its pKb is 14 922 478 Step 1    See Answer
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