Question: Zinc and magnesium metal each react with hydrochloric acid according to the following equations: Zn(s) + 2HCl(aq) ZnCl 2 (aq) + H 2 (g)

Zinc and magnesium metal each react with hydrochloric acid according to the following equations:

Zn(s) + 2HCl(aq) → ZnCl₂(aq) + H₂(g)

Mg(s) + 2HCl(aq) → MgCl₂(aq) + H₂(g)

A 10.00- g mixture of zinc and magnesium is reacted with the stoichiometric amount of hydrochloric acid. The reaction mixture is then reacted with 156 mL of 3.00 M silver nitrate to produce the maximum possible amount of silver chloride.

a. Determine the percent magnesium by mass in the original mixture.

b. If 78.0 mL of HCl was added, what was the concentration of the HCl?

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