Question

Step 14: Disconnect Flask A at point A. dry the outside of the flask A and weigh and record the flask and its contents

in step 14, after the reaction has gone to completion, if the outside of flask A was wet when you weighed it, how would this affect your results? Would this cause the measured molar volume of oxygen gas to be higher or lower? Explain why.

Answer 1

If the outside of flask A is wet when weighed, it would affect the results by increasing the measured mass and causing the molar volume of oxygen gas to be higher.

Step-by-step explanation:

If the outside of flask A was wet when you weighed it, it would affect your results because the wetness could be due to water that condensed on the outside of the flask. This would add to the mass of the flask, leading to a higher measured mass. As a result, the measured molar volume of oxygen gas would also be higher.

The reason for this is that when the wet flask is weighed, the added mass of the water would be included in the recorded mass. Since the molar volume of a gas is calculated using the ideal gas law (PV = nRT), an increase in the recorded mass would increase the calculated number of moles (n) of oxygen gas. Since the volume (V) remains the same, the molar volume (volume per mole) of oxygen gas would be higher.

It's important to ensure the flask is completely dry before weighing it to obtain accurate measurements and to avoid any interference from the presence of water.