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Discussion Response Post to: mole and equivalent concept

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Himanshu (9616)

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ans 3)take volume of CH₄ = x

N₂ = y

CO = z

we are burning in excess of O₂ so write the reactions firstly

CH₄ + 2O₂ -------> CO₂ + 2H₂O

CO + 1/2 O₂ -------> CO₂

N₂ + O₂ wont give u any reaction

we are given x + y + z = 20 ml.............a)

from x ml of CH₄ we will get x ml of CO₂

N₂ will be unreacted

from z ml of CO we will get z ml of CO₂ ,

KOH will react with CO₂ (as KOH abosorbs carbon di oxide), so if it will abosorb , the volume will become less

it is given derz a contraction of 14 ml

x+z = 14 ml...............b)

now see the reactions

x ml of methane will take 2x ml of O₂ (2 moles)

z ml of CO will take z/2 ml of O₂ (1/2 moles)

total moles of O₂ are given 13ml

2x + (z/2) = 13................c)

solve these equations......

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