Question

Calculate the number of electrons required to convert 1.6gm of sulphur to sulphide (5^2-)

Answer 1

Explanation:

Weknowthat:Ptotal=pP+pQ=pP0xP+pQ0xQ

where p P 0 and p Q 0 are partial pressures of pure substances. x P and x Q are mole fractions.wherepP0andpQ0arepartialpressuresofpuresubstances.xPandxQaremolefractions.

x P = 5 3 =0.6xP=53=0.6

x Q = 5 2 =0.4xQ=52=0.4

hence P total =p P 0 x P +p Q 0 x Q =80×0.6+60×0.4=72torrhencePtotal=pP0xP+pQ0xQ=80×0.6+60×0.4=72torr