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What is the molarity of sodium vanadate (Na3VO4) solutions if 34.6 ml of the solution are...

What is the molarity of sodium vanadate (Na3VO4) solutions if 34.6 ml of the solution are needed to titrate a .514g sample of pure potassium sulfite? VO4^-3 + SO3^-2 + 4H^+ = VO^+ +SO4^-2 + 2H2O

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Answer #1

VO4^-3 + SO3^-2 + 4H^+---------->VO^+ +SO4^-2 + 2H2O

no of moles of K2So3 = W/G.M.Wt

                                    = 0.514/158 = 0.00325 moles

from balanced equation

1 moles of K2So3 react with 1 moles Na3Vo4

0.00325 moles of K2So3 react with 0.00325 moles Na3VO4

molarity Na3VO4 = no of moles/volume in L

                           = 0.00325/0.0346 = 0.094 M

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