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Solid zinc oxide (ZnO) is added to hydrochloric acid (HCl) to form zinc chloride (ZnCl2) in water (H2O). How many moles of zinc chloride (ZnCl2) will be produced when 112 grams of zinc oxide (ZnO) is used?




ZnO + 2HCl --> ZnCl2 + H2O

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Answer:

1.376 moles ZnClâ‚‚

Explanation:

Based on the reaction:

ZnO + 2HCl → ZnCl₂ + H₂O

1 mole of ZnO reacts with 2 moles of HCl to produce 1 mole of ZnClâ‚‚.

To solve this question we need to convert the mass of ZnO to moles using its molar mass (ZnO = 81.38g/mol). The moles of ZnO added are the moles of ZnClâ‚‚ produced (1mole of ZnO produce 1 mole of ZnClâ‚‚):

Moles ZnO = Moles ZnClâ‚‚:

112g ZnO * (1mol / 81.38g) = 1.376 moles ZnClâ‚‚

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