Ap Chemistry Lab Report
AP Chemistry
Period 1
Molecular Weight of a Condensable Vapor Lab
Purpose:
The purpose and objective of this lab was to find the molecular weight of a condensed vapor.
Materials and Equipment:
• Aluminum foil square (around 6cm on a side)
• 125 mL flask
• Barometer
• 3 mL of unknown liquid
• 200 mL graduated cylinder
• 600 mL beaker
• Pin
• Balance (0.002g)
• Bunsen Burner setup
• Rubber band
• Thermometer
• Ceramic center wire gauze
Procedure:
1. A 125 mL flask was obtained. The square of aluminum was fashioned over the flask by laying the foil over the mouth and folding the sides down. A pin was then obtained and was used to poke a tiny hole in the center of the aluminum cap.
2. Next, the mass was determined of …show more content…
Why is the temperature of boiling water used for measuring the volume of the vapor instead of the temperature of the liquid after it has cooled to room temperature? Instead of taking the temperature of the gas, the temperature of the boiling water was taken and was transferred.
4. When vaporized, the volatile liquids used in this experiment do not behave exactly as ideal gases. How would this tend to affect your calculated molecular weight? The molecular weight was smaller than expected. This happened because the density was smaller due to the mass being smaller and this meant too much vapor escaped the flask.
Conclusion:
In this experiment, the molecular weight of a condensed vapor was found through a procedure using an unknown liquid. The flask before adding the unknown liquid in was full of air. After the beaker full of water started to boil the flask was examined until the unknown liquid was completely vaporized. At that exact point the flask contained all vapor. At the final weighing the flask contained condensed vapor and air. There is always a chance for error. Some sources of error could have come with completing this lab over an open water bath and some water vapor may have been in place. Also, too much vapor could have escaped and the experiment might not have been stopped quick
Period 1
Molecular Weight of a Condensable Vapor Lab
Purpose:
The purpose and objective of this lab was to find the molecular weight of a condensed vapor.
Materials and Equipment:
• Aluminum foil square (around 6cm on a side)
• 125 mL flask
• Barometer
• 3 mL of unknown liquid
• 200 mL graduated cylinder
• 600 mL beaker
• Pin
• Balance (0.002g)
• Bunsen Burner setup
• Rubber band
• Thermometer
• Ceramic center wire gauze
Procedure:
1. A 125 mL flask was obtained. The square of aluminum was fashioned over the flask by laying the foil over the mouth and folding the sides down. A pin was then obtained and was used to poke a tiny hole in the center of the aluminum cap.
2. Next, the mass was determined of …show more content…
Why is the temperature of boiling water used for measuring the volume of the vapor instead of the temperature of the liquid after it has cooled to room temperature? Instead of taking the temperature of the gas, the temperature of the boiling water was taken and was transferred.
4. When vaporized, the volatile liquids used in this experiment do not behave exactly as ideal gases. How would this tend to affect your calculated molecular weight? The molecular weight was smaller than expected. This happened because the density was smaller due to the mass being smaller and this meant too much vapor escaped the flask.
Conclusion:
In this experiment, the molecular weight of a condensed vapor was found through a procedure using an unknown liquid. The flask before adding the unknown liquid in was full of air. After the beaker full of water started to boil the flask was examined until the unknown liquid was completely vaporized. At that exact point the flask contained all vapor. At the final weighing the flask contained condensed vapor and air. There is always a chance for error. Some sources of error could have come with completing this lab over an open water bath and some water vapor may have been in place. Also, too much vapor could have escaped and the experiment might not have been stopped quick