Science Will Save the World! Episode 3: We’ve Got Chemistry! (Acid and Base Experiment) with Jessie Rack

Science Will Save the World! Episode 3: We’ve Got Chemistry! (Acid and Base Experiment)

With Jessie Rack

Today we are exploring the wonderful world of chemistry with an acid-base experiment. Using household ingredients, we create a reaction that (if we’re lucky) makes a Ziploc bag explode!

Ingredients:

1/2 cup Vinegar

2 Tablespoons Baking Soda

Ziploc bag Paper towel (ripped into a square)

3/4 cup water

Food coloring (optional)

Vocabulary:

Atom – the teeny-tiny building blocks that make up all matter in the universe. Kind of like Legos.

Ion – atoms or groups of atoms with an electrical charge, either positive or negative.

Acids and Bases – special chemicals that contain lots of ions, which makes them want to react with each other. Acids have lots of positive ions; bases have lots of negative ions.

*** Higher-Level Science Explanation:

What’s really happening here is a two-part reaction.

n step one, vinegar (acetic acid) reacts with the baking soda (sodium bicarbonate) to form sodium acetate and carbonic acid.

In step two, the carbonic acid immediately falls apart into carbon dioxide and water. The bubbles you see are the carbon dioxide leaving the solution!

Equation: (for proper notation, see https://www.thoughtco.com/equation-fo…)

Step 1: Sodium bicarbonate + acetic acid → sodium acetate + carbonic acid NaHCO3 + HC2H3O2 → NaC2H3O2 + H2CO3

Step 2: Carbonic acid → water + carbon dioxide H2CO3 → H2O + CO2

Once again, this production is brought to you by the University of Arizona’s Community and School Garden Program. And Penny!

Science Will Save the World! Episode 2: Sky Island Field Trip with Jessie Rack

Science Will Save the World! Episode 2: Sky Island Field Trip

With Jessie Rack

The word of the day is biome! You can think of a biome as a “nature zone” – a zone that’s defined by what kind of plants live there. Mountains in the Sonoran Desert are special because they are sky islands – as you go up the mountain, it gets cooler and wetter, which means the nature zones change with elevation. Let’s go on a field trip up a sky island in Arizona! Biomes we experience today: Desert Grassland Deciduous Forest (trees that lose their leaves. This one is an oak forest) Chaparral Coniferous Forest (trees with needles) Can you draw your own sky island? Draw a mountain where the nature changes as you go up it. Feel free to use your imagination! I’d love to see what you come up with.

This video was filmed at various points on Babad Do’ag, also known as Mount Lemmon, in Tucson, Arizona. Once again, this production is brought to you by the University of Arizona’s Community and School Garden Program. And Penny!

PS: Most of what I know about sky islands was gained by reading A Natural History of the Sonoran Desert, published by the Arizona-Sonora Desert Museum (https://www.desertmuseum.org/) Interested in learning more about sky islands or about conserving these amazing places? Check out Sky Island Alliance (https://www.skyislandalliance.org/)