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Problem: Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid, HCl(aq), as described by the chemical equation MnO2 (s) + 4HCl (aq) → MnCl2 (aq) + 2 H2O (l) + Cl2 (g) How much MnO2(s) should be added to excess HCl(aq) to obtain 225 mL of Cl2(g) at 25° and 715 Torr?

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Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid, HCl(aq), as described by the chemical equation 

MnO(s) + 4HCl (aq) → MnCl2 (aq) + 2 H2O (l) + Cl2 (g) 

How much MnO2(s) should be added to excess HCl(aq) to obtain 225 mL of Cl2(g) at 25° and 715 Torr?

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Our tutors have indicated that to solve this problem you will need to apply the Gas Stoichiometry concept. If you need more Gas Stoichiometry practice, you can also practice Gas Stoichiometry practice problems.