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19 solutions

Collecting Gas Over Water

Q. a reaction produces .35 L of a gas that is collected over water at 30C. the pressure in the collection flask is measured to be 755 torr. if the vapor pressure of water at this temperature is 31.8 torr, what is the pressure of the collected gas (in torr)? a) 755.0 b) 762.2 c) 786.8 d) 723.2

Solved • Dec 2, 2019

Collecting Gas Over Water

Q. If 0.500 grams of potassium chlorate decomposed, what volume (in liters) of oxygen gas would be collected over water at a barometric pressure of 743 mm Hg and 25.0 degree Celsius?

Solved • Nov 23, 2019

Collecting Gas Over Water

Q. Consider the following reaction to generate hydrogen gas: Zn(s) + 2 HCl(aq) → ZnCl2(aq) + H2(g) The hydrogen gas is collected by displacement of water at 35.0 °C at a total pressure of 740 torr. The vapor pressure of water at 35.0 °C is 42 torr. Calculate the partial pressure of H2 (in atm) if 324.4 mL of gas is collected over water from this method.

Solved • Nov 18, 2019

Collecting Gas Over Water

Q. A sample of oxygen gas is collected over water at 25°C and a total pressure of 641 torr. The volume of the gas collected is 500.0 mL. What mass of oxygen is collected? The vapor pressure of water at 25°C is 23.8 torr.

Solved • Nov 18, 2019

Collecting Gas Over Water

Q. Dilute hydrochloric acid is added to a 0.500 g sample of an alloy containing Zinc and copper. The gas evolved is collected over water. The following data were obtained: Barometric pressure : 737 mmHg Temperature: 23 degree Celsius What is the percent of zinc in the alloy?

Solved • Nov 12, 2019

Collecting Gas Over Water

Q. A 0.605 g sample of a certain metal, X, reacts with hydrochloric acid to form XCl3 and 450. mL of hydrogen gas collected over water at 25 degree Celsius and 740. mm Hg pressure. What is the atomic weight of X?

Solved • Nov 12, 2019

Collecting Gas Over Water

Q. A sample of Sodium metal is added to water and the hydrogen gas evolved is collected in a gas measuring tube over water. The equation for the reaction is 2Na(s) + 2H2O —> 2NaOH(aq) + H2(g) If 95.0 mL of hydrogen are collected at 27 degree Celsius and 0.974 atm , what mass of sodium reacted?

Solved • Nov 12, 2019