PERFORMANCE ASSIGNMENT                  S3b

 

Finding the Experimental Volume of CO2 Produced

 

 

Procedure:

 

  1. Obtain a 600 ml Erlenmeyer Flask, a 600 ml beaker, 100 ml graduated cylinder, rubber stopper and rubber tube.
  2. Find the mass of the alka-seltzer tablet and record.
  3. Fill the Erlenmeyer Flask with 500 ml of water and tape an alka-seltzer tablet so that it hangs inside the flask below the stopper but above the water.
  4. Fit the rubber tube to the stopper and insert the stopper into the flask.
  5. Invert the flask, the alka-seltzer should begin to react, and collect the water displaced from the flask in the beaker.  Keep the beaker above the flask.
  6. Once the alka-seltzer is completely reacted, place the flask right-side up and collect any water still in the rubber tube.
  7. Measure and record the amount of water collected.
  8. Repeat the steps for about 75%, 50% and 25% of the tablet, weigh and record the mass each time.
  9. Find the theoretical production of CO2 for each of the four samples and record.
  10. Calculate the percent yield for CO2 and record.

 

Data:

 

MASS OF

ALKA-SELTZER

PERCENTAGE

OF THE WHOLE

ACTUAL CO2

PRODUCED

THEORETICAL

CO2 PRODUCED

PERCENT

YIELD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Graph:

 

  1. Construct a graph that shows percentage on the x-axis and volume of CO2 produced on the y-axis.
  2. From the previous calculations, graph the theoretical predictions for CO2 produced at 100%, 75%, 50% and 25% of the alka-seltzer tablet.
  3. From the experimental data, graph the actual production of CO2 at the percentages used.
  4. Title, label and key the graph, make sure the two line graphs are in different colors.