The forces that hold a gas together are dependent on the strength of the intermolecular forces of the substance and the interaction with the solvent. When collecting gas over water, the water vapor pressure, water temperature, and pressure of the room must be measured.
Based on gas law knowledge, an error in a lab calculation of the gas sample pressure would most likely result from which of the following?

Taking an incorrect temperature of the water due to leaving the thermometer in the water too long.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Recording an incorrect room pressure due to windows and doors being open in a laboratory causing fluctuations in room pressure.

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Incorrectly recording the water vapor pressure based on the water temperature from a reliable source.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Incorrectly lining up the water levels inside and outside the gas collection bottle.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A Recording an incorrect room pressure due to windows and doors being open in a laboratory causing fluctuations in room pressure.
The error in recording pressure can be due to external factors like windows, doors that causes fluctuations in room pressure.

Suggest Corrections

Similar questions

Q. An ideal gas, of volume

189 m L

, is collected over water. The temperature is

27^{\circ} C

, and the barometric pressure is

756 m m H g

. At

27^{\circ} C

, the vapor pressure of water is

27 m m H g

Which of the following CORRECTLY gives the mole fraction of water vapor in the collection vessel?

The ideal gas law, which relates the P, V and temperature T of an ideal gas in a closed box, given as PV = nRT, can be manipulated to construct an effective thermometer. A "constant volume gas thermometer” uses a sample of gas (commonly, nitrogen or helium) in a closed chamber, thus fixing the volume V. The temperature is then measured by reading off the corresponding pressure P. At the freezing point of water, it is seen that a gas thermometer records a pressure of 0.9 x 10⁵ Pa; it also records a pressure of 1.2 x 10⁵ Pa at the boiling point of water. What pressure will you find in the gas chamber at a room temperature of 23⁰C?

Q. In a certain lab, a mixture of three gases was collected over water into a clean, dry, evacuated glass vessel. The partial pressure of the gas mixture was measured and found to be