Question

7.1 grams of chlorine is made to react with 6 grams of hydrogen. Limiting reagent in this reaction is ________.

Answer 1

Reaction takes place as follows.

$C{l}_2\left(g\right)+H_2\left(g\right)\to 2HCl\left(g\right)$

1 mole of chlorine reacts with 1 mole of hydrogen.

No. of moles of chlorine $=\frac{7.1}{35.5}=0.2$

No. of moles of hydrogen $=\frac{6}{2}=3$

Thus less no. of moles of chlorine are present to react with 3 moles of hydrogen present so it is a limiting reagent.