⚗️ Part 1: Understanding Conservation of Mass

1. Define the Law of Conservation of Mass in your own words:

2. Circle the correct answer - What happens to atoms during a chemical reaction?

Atoms are created

Atoms are destroyed

Atoms are rearranged

Atoms disappear

3. Fill in the blanks:

In a chemical reaction, mass is neither ____________ nor ____________. The total mass of the ____________ equals the total mass of the ____________.

🧪 Part 2: Experimental Observations

4. Record your experimental data for the magnesium and hydrochloric acid reaction:

Mass before reaction: _________ grams

Mass after reaction: _________ grams

Difference in mass: _________ grams

5. What did you observe during the chemical reaction? Check all that apply:

Bubbles formed

Temperature changed

Colour changed

Gas was produced

The magnesium dissolved

6. Explain why it's important to use a sealed system when testing conservation of mass:

⚖️ Part 3: Chemical Equations and Mass

7. Match the chemical reaction terms with their definitions:

1. Reactants

2. Products

3. Chemical equation

4. Balanced equation

A. Shows what is formed in a reaction

B. Equal atoms on both sides

C. Starting substances in a reaction

D. Shows reactants and products with symbols

8. Complete the word equation for the reaction of baking soda and vinegar:

Sodium bicarbonate + Acetic acid → ____________ + ____________ + Sodium acetate

9. Draw a diagram showing how atoms are rearranged (not created or destroyed) in a simple chemical reaction:

🔬 Part 4: Real-World Applications

10. Circle the correct answer - In which situation would mass appear to change if you didn't use a closed system?

Dissolving salt in water

Burning a piece of paper

Mixing oil and water

Melting ice

11. Explain why the chemical industry relies on the Law of Conservation of Mass:

12. Scientific Report - Write a conclusion for your conservation of mass experiment:

13. If 5.2 grams of magnesium reacts completely with hydrochloric acid to produce magnesium chloride and hydrogen gas, and the total mass of products is 5.2 grams, what does this tell us about the reaction?

Conservation of Mass

Conservation of Mass

⚗️ Part 1: Understanding Conservation of Mass

🧪 Part 2: Experimental Observations

⚖️ Part 3: Chemical Equations and Mass

🔬 Part 4: Real-World Applications

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