https://www.teachingwithoutchairs.com/2019/06/chemistry-class-covalent-bonds.html
Materials:
* beaker or bowl
* water
* salt
* 9 volt battery
* 2 alligator clips
Aim:
Investigate electricity through water to break the covalent bonds that hold the oxygen and hydrogen
atoms together.
Method:
1. Fill the bowl about half full with water
2. Add 3 tablespoons of salt to the bowl and Stir for 3 or 4 minutes, dissolving as much as possible.
(The salt makes it easy to conduct electricity through the water)
3. Clip one end of one alligator clip on the positive end of the battery and one end of the other
alligator clip on the negative end of the battery. Then gently set the other ends of each clip in the
bowl of water, not touching each other. Hold the clips about half way out of the water too so that
you can see the reaction better.
4. Wait 1-2 minutes and write down any changes or observations
https://www.teachingwithoutchairs.com/2019/06/chemistry-class-covalent-bonds.html
Discussion:
1. Explain the bond type that exists between hydrogen and oxygen in a molecule of water. Use
electronegativity values to justify your choice.
2. Write a balanced chemical equation for the reaction that took place.
3. The chemical formula for water is H2O. How many hydrogen atoms are in each molecule of
water? How many oxygen atoms?
4. Did you notice there were more bubbles on one of your alligator clips than on the other
one? Explain why this occurred.