Stoichiometric Ratio (Sodium and Chlorine 1:1)

Determine the amount of one reactant needed to fully react with another, since atoms combine in fixed numerical ratios. Sodium and chlorine combine one to one to form sodium chloride.

$$n_{\text{Na}}=n_{\text{Cl}}$$

Variables

Symbol	Meaning	Unit
$n_{\text{Na}}$	Moles of sodium required	mol
$n_{\text{Cl}}$	Moles of chlorine present	mol

Worked example

Given 0.141 mol of chlorine atoms, you need exactly 0.141 mol of sodium atoms. Converting back to grams: 0.141 mol times 22.99 g/mol = 3.24 grams of sodium.

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Part of The Blueprint of Water