Question

Given the equation below and excess iron, what mass of hydrochloric acid would be required to make 0.92 moles of hydrogen gas? Round your answer to the nearest 0.01, and remember to include units and substance in your answer.

HCl + Fe --> FeCl2 + H2

Answer 1

To solve this problem, we need to use stoichiometry to determine the mass of HCl required to produce 0.92 moles of H2.

First, we need to determine the balanced chemical equation for the reaction between HCl and Fe:

2HCl + Fe --> FeCl2 + H2

This equation tells us that 2 moles of HCl react to produce 1 mole of H2.

So, if we want to produce 0.92 moles of H2, we will need:

(2 moles HCl / 1 mole H2) x (0.92 moles H2) = 1.84 moles HCl

Now we can use the molar mass of HCl to convert moles to grams:

1.84 moles HCl x 36.46 g/mol = 67.0 g HCl

Therefore, 67.0 g of HCl would be required to make 0.92 moles of hydrogen gas.