Single Replacement Reaction (Exploding Egg)

This is not an exercise in teaching students to balance chemical equations (that skill is developed after students develop the following skills): 1. differentiating between elements, compound and mixtures 2. Learning to read the periodic table 3. Learning to tell the difference between chemical and physical properties 4. Integrating this knowledge so that students can understand why elements bond to form various compounds...or not 5. Learning about the different types of chemical reactions 6. Learning about the evidence of a chemical reaction 7. Learning about conservation of matter 8. And then finally applying this knowledge toward balancing chemical equations such that the mass of the reactants equals the mass of the products.

Observation and inference are important skills for scientists to develop. Students at Parsons Junior High School in Redding, California participate in a hands-on science experience with direct application to California Science Standards. Students learn about safety procedures, the names of equipment, chemical reactions (in this example-a single replacement reaction), evidence of chemical reactions and their characteristics (i.e., endothermic or exothermic, producing a gas, color change, or precipitate). This demonstration shows and egg exploding. It is really fun to do and the students enjoy it as well. If you have questions about the procedure, or reactions to the reaction (ha, ha), then drop me a note.

Category:

Science & Technology

Tags:

• exothermic reaction
• science explosions
• chemical reaction videos
• teaching chemistry
• science demonstrations
• HCl + Zn
• producing hyrogen gas
• Hindenburg
• educational instruction
• middle school science
• Chuck Seligman

[colby1691]

Thank you for this video. It is quite informative. However, we, as chemistry class, are quite frustrated that you have the incorrect formulas for zinc chloride and hydrogen on the products side. The correct formula for zinc chloride should be ZnCl2 and hydrogen gas should be H2 (it is diatomic). Hopefully, you have corrected that mistake when you teach this to your students.

[doseofscience]

Thank you Colby. A few people have shared this information in other comments. When I made the video, I was thinking about introducing them to some lab equipment, sparking their interest in chemistry, and including some chemistry specific vocabulary. I included a complete methodology for balancing equations in a different video. I chose not to spend time balancing the equation here because there are time limits to these videos (10 minutes), and I didn't want to overdo intro. chem content.

[biomac321]

How were you able to hollow out the egg? I'd love to try this out with my class, but can't get it hollowed without breaking it.

[doseofscience]

I poke a hole in both sides of the egg (using a needle), then carefully peck away at the hole until it is about .5 cm in diameter. To get the egg out, I apply my sink hose (a little rubber tube that's attached to faucet) to one side of the egg and turn the water on. With barely any water pressure, I put the hose against the hole on the egg and wait patiently as the water pushing into the egg and empties it out on the other side. I used to blow it out with air (mouth)...that works as well.

[XxVizzinixX]

Looks like you need an assistant.

Nice hat.

[doseofscience]

You are soooo right! I make videos such as these after work hours or on weekends, so I am often on my own. Sometimes I bring my kids to the lab and they watch just for fun. It is tough trying to find a videographer whose work doesn't require my onscreen direction/prompting. I have a lot of fun doing this and I really want to keep that "Educational Spark" alive in students. Thanks for viewing the video.

Chuck

[MrSimongay]

2HCl + Zn  -> ZnCl2 + H2

[Godinezj07]

@Leanne19951

The vaseline creates a seal between the funnel and egg so the hydrogen gas wont escape through the sides.

[Leanne19951]

why did u put d vaseline to d egg?

does it do anything??

[TheAdrianaluvsyou]

im a sixth grader there and we were taking a tour of the school and visited classrooms and we visited his room and he did that and he dipped hot wax in a tube into cold water and it made a big flame of fire : )

[shianneluv]

haha hi guys!!!! its presley  lol waaaaz up?

[WeirdoTheRandom]

Ahhhh Seligman Im tottaly gonna add you! :D

-Per. 5-6 (I sit next to Tyler and Junior. . .Can you move them please? :/ )

[PichuCullen4]

Thanks for this video. : )

[sadooboo]

cough fagoot

[estefannie1]

WHAT'S THAT ? GASOLINE?

[Holocaustsurviver]

Parsons brings me back good memories, i used to go to that school when i was in 7th grade a year ago, with my syster who was in 8th grade. My sisters name is marilyn and i think she was in your science class. I appreciate if you would do more videos of the school, and i would also appreciate if you commented back.Thanks:}