Question

Use the reaction H2 + F2 → 2HF to respond to the item below.

a) What is the molar ratio of H2 to HF in this reaction?
b) If 4 moles of H2 react, how many moles of HF will be produced?
c) What type of reaction is this (e.g., synthesis, decomposition, single replacement)?
d) Write the balanced chemical equation for the reaction.

Answer 1

For 4 moles of H2 reacting with F2, 8 moles of HF will be produced according to the balanced equation H2 + F2 → 2HF, which follows the stoichiometry of a 1:2 ratio of hydrogen to hydrogen fluoride.

Step-by-step explanation:

The question asks about the chemical reaction between hydrogen gas (H2) and fluorine gas (F2) to produce hydrogen fluoride (HF). According to the balanced chemical equation for this reaction, 2 moles of hydrogen will react with 1 mole of fluorine to produce 2 moles of hydrogen fluoride.

If we start with 4 moles of H2, following the stoichiometric coefficients from the balanced reaction, we would produce twice that amount in moles of HF, which would be 8 moles.

The balanced chemical equation for the reaction is: H2 + F2 → 2HF. There is no need to write coefficients for the reactants when they are '1', and the ratio of hydrogen to hydrogen fluoride is 1:2, based on the stoichiometry of the reaction.