Fizzing Oranges

"Oranges" may not rhyme, but they do react!

Fizzing Oranges Experiment

Materials Checklist

Oranges are a delicious and healthy treat (even if you prefer bananas). There's just something about that perfect sweet-tart combination that really tastes great. This tartness comes from a chemical compound known as citric acid (C6H8O7), a weak acid found in all citrus fruits (creative name, right?).

As you might already know, sodium bicarbonate (NaHCO3), a.k.a. baking soda, reacts with acids, releasing carbon dioxide (CO2) gas in the process. Using this little bit of chemistry knowledge, we can show that oranges contain an acid by combining orange juice and baking soda and observing the reaction. Oh yeah, and to make things a little more fun, why not observe with our tongues?

Before You Start - Lab Safety

Always remember to wear eye protection during science experiments. Never handle sharp objects, open flames, chemicals, or other dangerous objects without adult permission and supervision.

I promise! Signed, ___________________________________
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Procedure

  1. Fizzing Oranges Experiment Step 1
    Step 1

    Ask an adult to cut the orange into slices for you. This experiment works a little better with wedge-shaped slices (instead of circular slices).

  2. Fizzing Oranges Experiment Step 2
    Step 2

    Use the paper towel to dry as much juice as possible off one of the orange slices. The idea is to prevent the reaction from happening until the final step.

  3. Fizzing Oranges Experiment Step 3
    Step 3

    Dip one side of the dry orange slice into the baking soda so that it forms a very thin layer. Feel free to gently brush a little off with your finger if the layer is a lot thicker than shown in the picture.

  4. Fizzing Oranges Experiment Step 4
    Step 4

    Holding the baking soda side away from your tongue, take a bite of the orange, making sure to bite off plenty of the orange as well as a bit of the baking soda. Mmm, tastes like science!

    Yuck!

    This step can be a little gross, especially if you bite off a lot of baking soda. We recommend keeping the garbage or sink and a glass of water close by!

Materials Checklist

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Comments

On 28 March 2020, Anonymous Primate said,
0
"This is a great snack for kids to get them to eat their fruit, it's absolutely amazing!!!😋"
On 26 March 2020, Anonymous Primate said,
1
"really cool and tasted like fanta"

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