76
Lesson 76 of 84 · Matter
ExperimentMixtures and Solutions (Part 3)
What You'll Learn
Solutions are special mixtures where one substance dissolves completely in another. Salt water is a solution where salt (solute) dissolves in water (solvent).
Key Words
- element
- compound
Materials Needed
- paper towels
- thermometer
- strainer
Safety First
- Protect your work surface with newspaper or plastic.
- Adult supervision recommended.
- Do not taste any materials.
Steps
Step 1 — Read
Read about Matter and write down three key facts.
Step 2 — Do
Mix baking soda and vinegar in a sealed bag. Weigh the bag before and after. Did the mass change? Explain why or why not using the law of conservation of mass.
Step 3 — Observe
Compare the before and after states.
Step 4 — Record
Write your conclusion: did the results match your hypothesis? What would you change next time?
Check Your Understanding
Question 1
1 of 3How is a compound different from a mixture?