Question

10L of chlorine gas react with 40L of hydrogen gas under the same condition of temperature and pressure. How much volume of HCl should be produced?
(a) 40L
(b) 30L
(c) 10L
(d) 20L

Answer 1

The reaction ratio of H2to Cl2 is 1:1. Because Cl2 is less than the hydrogen, it is the limiting reagent. Only 10L of H2 will react.

H2+Cl2⟹2HCl

According to the reaction above, when one mole of each gas reacts, 2 moles of HCl are produced. So the volume that will be produced in this case will be 10×2=20l.