Gradebook 3/29/2018 11:59 PM A 94.1/100 3/29/2018 12:02 ANM Print CalculatorPeri

Question

Gradebook 3/29/2018 11:59 PM A 94.1/100 3/29/2018 12:02 ANM Print CalculatorPeriodic Table n 13 of 17 Incorrect Incorrect Incorrect Incorrect Incorrect Incorrect Incorrect Incorrect Incorrect General Chemistry 4th Edition University Science Books presented by Sapling Learning Balance the following equation for a half reaction that occurs in acidic solution Use e as the symbol for an electron Tip: If you need to clear your work and reset the equation, click the button that looks like two red arrows Tools Previous Give Up & View SolutionCheck AnswerNextExit Hint Start by balancing W In acidic solution, you may add H2O and H* as needed to balance O and H When finished, don't forget to balance the charge by adding e as needed

Explanation / Answer

reaction
WO3 --> W2O5
for balancing W multiply cofficient of WO3 by 2
2WO3 --> W2O5

for balancing O add 1 H2O to product side
2WO3 --> W2O5 + H2O

for balancing H add 2 H+ to reactant side
2WO3 + 2H+ --> W2O5 + H2O

for balancing charge add 2 e- to reactant side
2WO3 + 2H+ + 2e- --> W2O5 + H2O

so, balance reaction is
2WO3 + 2H+ + 2e- --> W2O5 + H2O

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