PRACTICE: Limiting Reactants

The limiting reactant is the substance that is completely consumed in a chemical reaction, limiting the amount of product that can be formed.

To determine the limiting reactant, calculate the moles of each reactant and compare the mole ratios required by the balanced equation.

The molar mass of H2 (hydrogen gas) is approximately 2 g/mol.

The molar mass of F2 (fluorine gas) is approximately 38 g/mol.

Avogadro's number is 6.022 x 10^23, which is the number of particles (atoms, molecules) in one mole of a substance.

The mole ratio is the ratio of moles of one substance to the moles of another substance in a balanced chemical equation.

H2 is the limiting reactant because it will be consumed first based on the stoichiometry of the reaction.

The balanced equation is H2 + F2 → 2HF.

To convert grams to moles, divide the mass of the substance by its molar mass.

The product formed is hydrogen fluoride (HF).