Lesson 59 of 84 ยท Chemical Reactions
Experimentโญ 30 XP๐งช Potion KitchenSolubility and Concentration (Part 2)
Chemical Reactions.
๐ฏ Your mission
Run the experiment. Find out what really happens.
โก The twist
If it bubbles, something invisible is escaping.
Mind = Blown
๐ง Hot water can freeze faster than cold water under the right conditions. Nobody fully understands why.
Make a hypothesis first
Guess: will the fizz be loud, soft, or none at all?
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
Materials Needed
- thermometer
- strainer
- ice cubes
- salt
- sugar
- vinegar
Safety First
- Handle glass items carefully to avoid breakage.
- Do not mix unknown chemicals together.
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
Your toothpaste, your soap, even your breakfast involves this.
Stretch Challenge
Try this in real life this week.
Ask a grown-up to help you mix two safe kitchen things. Predict what will happen first.
For the dinner table
โWhat's something we cook that mixes things together this way?โ
Next Smart Experiment
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Checkout complete lesson on Chemical Reactions for 7th Grade
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