1. CO2 and Mass In this lab, you will use chemistry to determine the mass of CO2. You will do this by mixing baking soda and vinegar together. The reaction will produce CO2 and the balloon will trap the CO2 inside. You’ll weigh it before and after the reaction. Then release the CO2 by popping the balloon and recording the final weight.

2. Materials 1 125 mL flask 1 large balloon 1 pin (or scissors) 1 microspoon spatula 40 mL of baking soda 80 mL of vinegar 50 mL beaker Scale Metal pie tin Safety glasses Worksheet

3. Measure 40 mL of baking soda in the 50 mL beaker. Use the microspoon to put the baking soda inside the balloon.

4. Try keeping the baking soda inside the balloon.

5. Pour 80 mL of vinegar into a 250 mL flask and attach the balloon containing the baking soda to the flask. Be careful not to mix the baking soda with the vinegar.

6. Place the tray on the scale, zero it out by holding down the on button. Now place the flask on the scale. Record the weight in grams in the first column in Table 1.

7. Release the baking soda from the balloon into the vinegar. Hold the mouth of the balloon as the balloon expands.

8. Place the inflated balloon and flask on the scale. Weigh and record the mass in grams and record in the 2 nd column of Table 1.

9. Release the CO2 by piercing the balloon.

10. Place the balloon and flask on the scale. Record the weight in grams in the 3 rd column in Table 1.

11. Determine the mass of the gas and record the data in Table 1. Mass of flask and balloon before reaction (grams) Mass of flask and balloon after reaction (grams) Mass of flask and balloon after gas has escaped (grams) Mass of gas (CO 2 ) (grams) Clean up you lab station by washing out the flask, throwing out the balloon, and returning materials from where you picked them up.