For the reaction

CHEMISTRY · Single correct · A Level · Chemistry · Amount of substance · Amount of substance

Problem

For the reaction

2\,\text{Al}(s)+3\,\text{Cl}_2(g)\rightarrow 2\,\text{AlCl}_3(s)

, a chemist combines exactly

1.00\,\text{mol}

of Al with

1.00\,\text{mol}

of Cl

_2

. Which of the following best explains which reactant limits the extent of the reaction? (a)

\text{Al is the limiting reactant because it appears with the smaller stoichiometric coefficient in the balanced equation.}

(b)

\text{Cl}_2\text{ is the limiting reactant because it has the larger stoichiometric coefficient, so the equal }1.00\,\text{mol}\text{ supply will be exhausted first.}

(c)

\text{Cl}_2\text{ is the limiting reactant because the reaction requires }1.5\text{ mol of }\text{Cl}_2\text{ for every }1.0\text{ mol of Al, but only }1.0\text{ mol of }\text{Cl}_2\text{ is available.}

(d)

\text{No reactant is limiting; having equal initial moles means both are completely consumed.}