Candy Experiments 2
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About this ebook
Marshmallows, cotton candy, Pixy Stix, Jawbreakers, Pop Rocks, gummi candy, chocolate, and even soda provide good excuses to get destructive in the kitchen. Do Peeps dissolve when you drop them into very hot water? Can you make gummi candy disappear in water? What happens to cotton candy when you dip it in oil?
Candy Experiments 2 is full of new ideas for learning science through candy. Each experiment includes basic explanations of the relevant science. The book is written for children between the ages of 7 and 10, though older and younger ages will enjoy it as well.
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Book preview
Candy Experiments 2 - Loralee Leavitt
Water is made of hydrogen and oxygen. Sometimes water breaks into smaller pieces of hydrogen (H+) and oxygen/hydrogen (OH-). Both H+ and OH- react with other molecules. But in a glass of pure water, when you have equal amounts of H+ and OH-, you don’t see this effect.
An acidic solution contains more H+. Acid reacts with certain kinds of substances, such as baking soda and eggshells. It also creates a sour sensation when you taste it. (Anything that tastes sour contains acid.)
A basic solution contains more OH-. Bases also react with certain kinds of substances, including acids.
In this chapter, you’ll use color-changing gummi bears, fizzing candy, and eggs with Warheads to learn about acids and bases.
Photo: Warheads Sour Spray is even more acidic than Warheads candy. When you spray it onto an eggshell, it eventually makes the eggshell bubble.
Time
Several hours
Skill Level
Easy
Can you turn a red gummi bear blue?
What you need:
Red gummi bear or gum worm from a package of Black Forest Made with Real Fruit Juice
gummi candy
Small clear bowl with ½ cup of water
Baking soda
What to do:
1Add ½ teaspoon of baking soda to the bowl of water. (Proportions do not need to be exact.)
2Place the gummi bear in the water.
3Wait several hours. Do you see a blue rim forming around the edge of the gummi bear?
How can you turn a red gummi bear blue?
What’s happening:
Black Forest Made with Real Fruit Juice
gummi bears are colored with natural food extracts, not the petroleum-based dyes used in most candy. The red gummi bears are colored with black carrot extract, which happens to be an acid-base indicator. When it’s mixed with a base, it turns blue. So if your black carrot gummi bear absorbs baking soda water, which is basic, it turns blue from the outside in. After two days, it should be completely blue.
Do you notice any bubbles on the gummi bear? These bubbles are created when the baking soda in the water reacts with the citric acid flavoring in the gummi bear. Your gummi bear might end up looking as if it has blisters!
Can you change it back? To try, dump out the baking soda water and put the gummi bear in an acidic solution, like vinegar. (Careful—a water-logged gummi bear is fragile!) Alternatively, you can add acid (such as vinegar) to neutralize the baking soda and turn the water acidic. If the dye hasn’t dissolved out of the bear, and if the bear can absorb any more liquid, you might be able to change the color again.
more fun
The yellow gummies from Black Forest Made with Real Fruit Juice
are colored with turmeric, a yellow spice that is also an acid-base indicator. This indicator turns red in a strong base. (Baking soda isn’t basic enough.) To see the change, ask a grown-up to help you mix some ammonia or washing soda with water, then put the yellow bear in the water.
WARNING: These chemicals are poisonous, so label the experiment, and make sure nobody eats it!
This yellow gummi bear turns red in ammonia.
TIME
Up to an hour
SKILL LEVEL
Medium
What can you use to test acidity: pH paper or your tongue? Or both?
What you need:
A variety of sour candies such as Warheads, Lemonheads, Sour Patch Kids, or Skittles
Small bowls
pH indicator paper, ranging from a pH of about 1 to 7 (available on Amazon)
Warm water
What to do:
1Put a few pieces of candy in each bowl. (Use a separate bowl for each kind of candy.)
2Pour warm water into each bowl until the candy is covered.
3Let the sour part of the candy dissolve. (Some candies have a sour shell, and some need to dissolve