Problem: Binary compounds of alkali metals and hydrogen react with water to liberate H2 (g). The H2 from the reaction of a sample of NaH with an excess of water fills a volume of 0.495 L above the water. The temperature of the gas is 35 oC and the total pressure is 760 mmHg .Find the mass of H2 liberated.

FREE Expert Solution
  • Reaction will appear as:

NaH (s) + H2O (l) → H2 (g) + OH- (aq)

  • Calculate for the moles (eventually the mass) of gas H2 using the conditions given via ideal gas equation
  • Ideal gas equation will appear as:
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Problem Details

Binary compounds of alkali metals and hydrogen react with water to liberate H2 (g). The H2 from the reaction of a sample of NaH with an excess of water fills a volume of 0.495 L above the water. The temperature of the gas is 35 oC and the total pressure is 760 mmHg .

Find the mass of H2 liberated.

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What scientific concept do you need to know in order to solve this problem?

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