Home > The concept of the "rubber egg"- Chemical equation as ionic or molecular
The concept of the "rubber egg"- Chemical equation as ionic or molecular
Watch this short video below that describes the concept of the "rubber egg":
https://www.youtube.com/watch?v=fEYS5i5P7YY
Answer the following six questions:
1.) In the "rubber egg" experiment, the following chemical reaction is occurring:
CaCO3 (s) + 2CH2CO2H (aq) -> Ca(CH2CO2)2 (aq) +CO2 (g) + H2O (I)
The rubber egg experiment is an example of chemical change that is also accompanied by physical changes.
True or False?
2.) In the "rubber egg" experiment, the following chemical reaction is occurring:
CaCO3 (s) + 2CH2CO2H (aq) -> Ca(CH2CO2)2 (aq) +CO2 (g) + H2O (I)
By matching, label each compound that appears in this chemical equation as ionic or molecular. Please remember to interpret the numbers as subscripts, so that CH2CO2H is really CH2CO2H.
CaCO3: Ionic or Molecular?
CH2CO2H: Ionic or molecular?
Ca(CH2CO2)2: Ionic or molecular?
CO2: Ionic or Molecular?
H2O: Ionic or Molecular?
3.)Calcium carbonate, or CaCO3, is the compound that gives egg shells their properties. What is the mass percentage of the element calcium in CaCO3? This is a numerical answer question, so you only need to enter a value (no units are accepted)
4.)The average eggshell contains 5.5 g of CaCO3. How many moles of CaCO3 is that? (This is a numerical answer question, so you only need to enter a value).
5.) The average eggshell contains 5.5 g of CaCO3. Based off of your answer from the previous question, do we have more than, less than, or exactly equal to an Avogadro's Number of CaCO3 compounds?
6.) Make your own rubber egg and upload both a photo and provide an explanation of the chemical and physical changes occurring.
