Determination of Gas Volume in a Flask Experiment
What is the experimental setup to determine the volume of gas in a 125 mL flask?
A student needs to determine the volume occupied by a gas in a 125 mL flask using the experimental setup described in the procedure. The student measures the volume of the flask to be 157 mL to the top of the flask. The student measures the volume of the flask with a stopper in it to be 140 mL. The student performs the experiment by reacting the strip of magnesium with 5 mL of HCl solution. What is the volume of the flask occupied by the hydrogen gas?
Answer:
Volume of flask without stopper=157 mL-5mL=152 mL
Volume of flask with stopper=140-5=135 mL
In this experiment, the student is measuring the volume of gas in a 125 mL flask using different methods. The volume of the flask with and without the stopper provides important data for calculating the volume of gas. By reacting magnesium with HCl solution, the student can isolate the volume occupied by the hydrogen gas.
Based on the measurements provided, the volume of the flask without the stopper is 152 mL, while the volume with the stopper is 135 mL. This difference accounts for the volume occupied by the hydrogen gas above the reaction solution. It is essential to consider the practical aspects of the experiment, such as the stopper remaining in place to prevent gas from escaping.
The volume of gas in the flask can be calculated by subtracting the volume of the reaction solution from the total volume of the flask. This data allows the student to determine the volume of gas produced in the reaction accurately.