In coal, pyrites `(FeS_(2))` is present as a pollution-causing impurity, which is removed by combustion.
`2FeS_(2) + 5O_(2) rarr 4SO_(2) + 2FeO`.
What volume of `3.0 M KOH` would be required to react with the `SO_(2)` produced in

Options

A. `2.77 L`
B. `5.54 L`
C. `1.38 L`
D. `8.31 L`

Answer

B

Explanation

`2KOH + SO_(2) rarr K_(2) SO_(3) + H_(2) O`
Moles of `KOH = 2 xx` moles of `SO_(2) = 2 xx 8.32`
`M xx V_(L) =` Moles of `SO_(2)`
`3 xx V_(L) = 2 xx 8.32`
`V_(L) = 5.54 L`