How many grams of chlorine gas are needed to make 117 grams of sodium chloride?
Given the reaction:
2Na + Cl₂ → 2NaCl

Question

How many grams of chlorine gas are needed to make 117 grams of sodium chloride? Given the reaction: 2Na + Cl₂ → 2NaCl

Quizplus · Accepted Answer

To find the amount of chlorine gas needed to produce 117 grams of sodium chloride (NaCl), we use the stoichiometry of the balanced chemical equation provided: $2\text{Na} + \text{Cl}_2 \rightarrow 2\text{NaCl}$. The molar mass of NaCl is approximately 58.5 g/mol. Thus, 117 grams of NaCl is equivalent to $117 \, \text{g} \div 58.5 \, \text{g/mol} = 2 \, \text{mol}$ of NaCl. According to the equation, 2 moles of NaCl require 1 mole of $\text{Cl}_2$, which has a molar mass of approximately 71.0 g/mol ($35.5 \, \text{g/mol} \times 2$). Therefore, 71.0 grams of chlorine gas are needed.

How Many Grams of Chlorine Gas Are Needed to Make