By passing electric current,`NaClO_3`, is converted into `NaClO_4`, according to the following equation:
`NaClO_3 + H_2O rarr NaClO_4 + H_2`
How many moles of `NaClO_4`,, will be formed when three Faradays of charge ispassed through `NaCIO_3`?

Options

A. 0.75
B. 3
C. 1.5
D. 1

Answer

C

Explanation

`overset(+5)(NaClO_(3))+ H_(2)O to overset(+7)(NaClO_(4))+ H_(2)`
or
`NaClO_(3)-2e^(-) to NaClO_(4)`
This is clear that 2 moles of electrons or 2 faradays charge produce 1 mole of `NaCIO_(4)`. Thus, 3 faradays charge will produce
`= (1)/(2) xx 3 "moles of" NaClO_(4) = 1.5 "moles of" NaClO_(4)`