Lesson 24 of 84 · Chemical Reactions
Experiment⭐ 30 XP🧪 Potion KitchenSolubility and Concentration
Chemical Reactions.
🎯 Your mission
Predict it first. Then prove yourself right (or wrong).
⚡ The twist
Color changes mean atoms are rearranging — even if you can't see them.
Mind = Blown
🧪 If you could remove all the empty space from atoms, the entire human race would fit in a sugar cube.
Make a hypothesis first
Before you mix: what color do you think it'll turn?
What You'll Learn
Solubility describes how much of a substance can dissolve in a solvent at a given temperature. Most solids dissolve better in hot water, while gases dissolve better in cold water.
Key Words
- reactant
- product
- conservation of mass
Materials Needed
- ice cubes
- salt
- sugar
- vinegar
- baking soda
Safety First
- Wash hands after handling materials.
- Be careful with scissors — ask an adult for help if needed.
- Do not look directly at the sun or bright lights.
Steps
Review the background information on Chemical Reactions before starting.
Conduct a chromatography experiment: use a coffee filter and markers to separate the pigments in different colored inks.
Use your senses (except taste) to describe what you notice.
Write a summary of your findings in 3-5 sentences.
Check Your Understanding
Question 1
1 of 3What is condensation?
Where you see this in real life
This is happening in your kitchen right now — every time food cooks.
Stretch Challenge
Try this in real life this week.
Find one ingredient in a snack and look up what it does.
For the dinner table
“What's something we cook that mixes things together this way?”
Next Smart Experiment
We'll pick an experiment that matches exactly how you're thinking right now.
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Send it to a parent who's looking for a 10-minute kitchen science win.
Checkout complete lesson on Chemical Reactions for 7th Grade
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