Question

air contain 20% O2 by volume. how many c.c air will be required for oxidation of 100 cc of acetylene

Answer 1

The reaction taking place is as follows:
2C₂H₂ + 5O₂ → 4CO₂ + 2H₂O
Here, we can see that,
2 cc of C₂H₂ reacts with 5 cc of O₂
Therefore, for 100 cc of C₂H₂,
Amount of O₂ required = (5/2) x 100 = 250 cc
Given,
Air contains 20% O₂ by volume
Thus,(20/100) x Amount of air = 250 cc
Hence,
Amount of air required = 250 x (100/20) = 1250 cc