Concept explainers
When water is added to a mixture of aluminum metal and sodium hydroxide, hydrogen gas is produced. This is the reaction used in commercial drain cleaners:
(a) Calculate the molarity of the initial NaOH solution.
(b) How many moles of hydrogen were formed?
(c) The hydrogen was collected over water at 25°C and 758.6 mm Hg. The vapor pressure of water at this temperature is 23.8 mm Hg. What volume of hydrogen was generated?
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Chemistry: Principles and Reactions
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