What is the molarity of asodium vanadate (Na 3 VO 4 ) solution if 35.6mLof the s

Question

What is the molarity of asodium vanadate (Na3VO4) solution if 35.6mLof the solution are needed to titrate a 0.759g sample of purepotassium sulfite? VO4-3+SO3-2+4H+--->VO++SO4-2+2H2O What is the molarity of asodium vanadate (Na3VO4) solution if 35.6mLof the solution are needed to titrate a 0.759g sample of purepotassium sulfite? VO4-3+SO3-2+4H+--->VO++SO4-2+2H2O VO4-3+SO3-2+4H+--->VO++SO4-2+2H2O

Explanation / Answer

VO4-3+SO3-2+4H+--->VO++SO4-2+2H2O oxidation state of S changed from +4 to +6 so change is 2 oxidation state of V is changed from +5 to +3 so change is2 Now if M is the molarity ofNa3VO4REQUIRED FOR THE TITRATION => meq of NA3VO4 = 2M*35.6 meq of potassium sulfite is = 1000*(0.759/158/2) =2.4018 => 2M*35.6 =2.4018 => M = 0.0337M so Molarity of Na3VO4 required for thee titration is0.0337M

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