Question

what is the percent and theoretical yield if 3.50 g of NaBr and 6 Ml of...

what is the percent and theoretical yield if 3.50 g of NaBr and 6 Ml of 9 M H2SO4 ?

Homework Answers

Answer #1

The balanced equation for the reaction taking place is:

2NaBr + 4H2SO4 ---> Br2 + 2SO2 + 4H2O + 2NaSO4

Moles of NaBr taken = Mass/MW = 3.5/102.89 = 0.034 moles

Moles of H2SO4 = Molarity*Volume = 9*0.006 = 0.054 moles

As per the reaction stoichiometry, sulfuric acid is the limiting reagent as it is in lesser amount than needed for complete reaction with NaBr.

So,

Theoretical Moles of SO2 formed = 0.054/2 = 0.027 moles

Theroretical yield of SO2 = Moles*MW = 0.027*64.06 = 1.73 g

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