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Collecting Gas Over Water

Q. A sample of hydrogen gas was collected over water at 21oC and 685 mmHg. The volume of the container was 12.7 L. Calculate the mass of H2(g) collected. (Vapor pressure of water = 18.6 mmHg at 21oC.)

Solved • Apr 13, 2020

Collecting Gas Over Water

Q. A student weighs out 0.0422 g of magnesium metal. The magnesium metal is reacted with excess hydrochloric acid to produce hydrogen gas. A sample of hydrogen gas is collected over water in a eudiometer at 32.0°C. The volume of collected gas is 43.9 mL and the atmospheric pressure is 832 mmHg. Using the experimentally collected data, calculate R and the percent error

Solved • Apr 9, 2020

Collecting Gas Over Water

Q. A sample of hydrogen gas was collected over water at 36°C and 855 mm Hg. The volume of the container was 6.50 L. Calculate the mass of H2(g) collected. (Vapor pressure of water = 44.6 torr at 36°C) A. 0.58 g B. 9.38 g C. 0.55 g D. 4.69 g E. 0.27 g A.

Solved • Apr 8, 2020

Collecting Gas Over Water

Q. 3.0182 g of a sample of potassium carbonate and barium carbonate was treated with dilute sulfuric acid. The hydrogen gas was collected over water and measured a volume of 440 mL at a temperature of 25 °C. The atmospheric pressure was 757 mm of Hg and the pressure of water vapor at 25 °C is 22.4 mm of Hg. After the reaction, 2.427 g of barium sulfate was isolated. Calculate the % composition of the mixture.

Solved • Apr 4, 2020

Collecting Gas Over Water

Q. If a sample of oxygen gas is collected over water at a pressure of 0.921 atm and 23 C, what is the partial pressure of the oxygen gas?

Solved • Mar 24, 2020

Collecting Gas Over Water

Q. Hydrogen produced from a hydrolysis reaction was collected over water. The data is compiled in the table. Total volume of H2(g) collected 96.05 mL Temperature 27.0 °C Barometric pressure 745 mmHg Vapor pressure of water at 27.0 °C 27.0 mmHg Calculate the moles of hydrogen gas produced by the reaction.

Solved • Mar 13, 2020

Collecting Gas Over Water

Q. The following table provides some information on carbon dioxide solubility in water. At 1 atm, how many moles of CO2 are released by raising the temperature of 1 liter of warm water from 20°C to 25°C? Express your answer to four decimal places and include the appropriate units.

Solved • Jan 31, 2020