Rosechaniacocks Rosechaniacocks

21-10-2016
Chemistry

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If 20 grams of zinc reacts with hydrochloric acid, how much zinc chloride is produced?

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ALEXWOOD ALEXWOOD

21-10-2016

assuming there is excess acid, the equation for the reaction is Zn + 2HCl -> ZnCl2 + H2.
Mols of zinc = 20/65 (mass/relative atomic mass)
Ratio of Zn : ZnCl2 = 1 : 1
Hence mols of Zinc = mols of Zinc chloride
Mass of ZnCl2 = (20/65)(65+71)
= 41.8g

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