- #1

mimi88

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## Homework Statement

The ratio of KMnO4 to I2 is given by

2 MnO4 - + 16 H+ + 10 I - ⇌ 2 Mn2+ + 5 I2 + 8 H2O

the ratio is 2:5

- The ratio of I2 to S2O3

2- is given by 1 I2 + 2 S2O32- ⇌ 2 I-+ S4O5 2-

the ratio is 1:2

therefore n(S2O3 2- ) = n(MnO4 - ) x 5

## Homework Equations

Why the mole of (S2O3 2-) is equal to mol of ( MnO4-) times 5??

Where is the 5 come from?

What is the relationship between (S2O3 2- ) and ( MnO4-)?

Please help me, thanks.