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# How is pyrophosphate anion, P_2O_7^(4-) reduced to elemental phosphorus, with oxidation of hydrogen sulfide to sulphur?

## Question

###### How is pyrophosphate anion, P_2O_7^(4-) reduced to elemental phosphorus, with oxidation of hydrogen sulfide to sulphur?
How is pyrophosphate anion, P_2O_7^(4-) reduced to elemental phosphorus, with oxidation of hydrogen sulfide to sulphur?

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