A piece of zinc metal reacts in HCL(aq) to produce zinc chloride and hydrogen ga

Question

A piece of zinc metal reacts in HCL(aq) to produce zinc chloride and hydrogen gas accoridng to the equation : Zn(s) +2 HCl (aq) = ZnCl2 (aq) + H2 (g). The hydrogen gas generated is collected over water at 20.0 C. The volume of the gas is 246 mL at 760 mm Hg. What mass of zinc was used? ( Vapor pressure of water at 20.0 C =17.54 mm HG)

Explanation / Answer

What happens when you add zinc to hydrochloric acid? Elements and Compounds Questions Answers.com > Wiki Answers > Categories > Science > Chemistry > Elements and Compounds > Acids & Bases View Slide Show Best Answer Zinc + Hydrochloric acid is a basic metal acid reaction. When the Zinc is added to the acid, the zinc dissolves and reacts with the acid, forming hydrogen gas and the salt Zinc Chloride. These sorts of reactions (metal + acid) will always result in a salt (in this case, zinc chloride) and hydrogen gas. The observations from this experiment would be white-gray solid is added to colorless liquid. Solid dissolves and a colorless, odorless gas is formed. Zn + 2HCl -----> ZnCl2 + H2

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