Question

Select the missing conversion factor for the following set of calculations: Assume 95.4 grams of zinc, Zn, reacts with hydrochloric acid, HCl, to produce zinc (II) chloride, ZnCl2, and hydrogen, H2. The problem requires that you determine the mass of hydrochloric acid, HCl, needed for the reaction to occur. Zn(s) + 2 HCl(aq) → ZnCl2(aq) + H2(g)

Answer 1

To find the mass of hydrochloric acid needed when 95.4 grams of zinc react, calculate the moles of zinc, use the stoichiometry to find the moles of HCl, and then convert those moles to mass.

Step-by-step explanation:

The problem at hand involves a chemical reaction where zinc metal reacts with hydrochloric acid to produce zinc chloride and hydrogen gas. To determine the mass of hydrochloric acid required for the reaction, one can use stoichiometry based on the balanced chemical equation:

Zn(s) + 2HCl(aq) → ZnCl₂(aq) + H₂(g)

First, calculate the moles of zinc using its molar mass, then use the stoichiometry of the balanced equation to find the moles of hydrochloric acid needed, which is twice the moles of zinc. Finally, multiply the moles of HCl by its molar mass to find the mass of HCl required.