When 0.40 g of impure zinc reacted with an excess of hydrochloric acid, 127 mL of hydrogen
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When 0.40 g of impure zinc reacted with an excess of hydrochloric acid, 127 mL of hydrogen was collected over water at 10.°C. The external pressure was 737.7 Torr.
(a) What volume would the dry hydrogen occupy at 1.00 atm and 298 K?
(b) What amount (in moles) of H2 was collected?
(c) What is the percentage purity of the zinc, assuming that all the zinc present reacted completely with HCl and that the impurities did not react with HCl to produce hydrogen? The vapor pressure of water at 10.°C is 9.21 Torr.
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Related Book For 
Chemical Principles The Quest For Insight
ISBN: 9781464183959
7th Edition
Authors: Peter Atkins, Loretta Jones, Leroy Laverman
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