Core
Quantitative Chemistry: Chemical Equation
Slide 27 of 39
Factor Label
Method: 10. Volume (of gas A) ®Volume (of gas B)
The important thing to remember
with gas phase equations is that the coefficients
in the balanced equation can also represent the volume ratio in addition to mole ratio.
2H2 (g) +
O2 (g) ¾® 2H2O (g)
48.4 dm3 24.2
dm3 48.4 dm3 which reduces
to
2 dm3 1 dm3 2 dm3
10.
A mischievous student is interested in getting the optimum mixture of hydrogen
and oxygen in a plastic bottle so as to get the loudest bang when combusted.
Determine the volume of oxygen that he would need to mix with 300.0 cm3 of hydrogen.
