ch9 inflating heart lab

Purpose:

You will use stoichiometry to calculate how many grams of each reactant you will need to put in the zip loc bag to get the heart volume you desire. In class, you will combine your ingredients and approximate the resulting volume to see if you came close.

discussion:

When citric acid, also called hydrogen citrate [ citrate ion = C₆H₅O₇^-3] reacts with baking soda in the presence of water, a gas, carbon dioxide inflates the heart; liquid water and a sodium citrate solution are also formed. see Wack-A-Pack Balloon

calculations & Conclusions

1. Write balanced chemical equation with states for the reaction

2. We found the volume of the heart by water displacement. We found the volume of the heart was 70mL. What does 'finding volume by water displacement' mean?

3. We are going to use a ziploc sandwich bag for our heart. About what volume of gas could it hold? Maybe internet will help.

4. Choose a volume between 100mL and the maximum possible, then use stoichiometry to calculate how much of each of citric acid and baking soda you will need.

5. We burned isopropanol in class. (look up its formula) and write a chemical equation with states for the reaction.

6. We burned butane in class. (look up its formula) and write a chemical equation with states for the reaction.