Worksheet comparing physical and chemical properties with a classification table.

A worksheet titled "Physical Vs. Chemical Properties" with a table listing various properties and columns to classify them as physical or chemical, including examples like color, density, and flammability.

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Task:

Classify each of the listed properties as either a physical property or a chemical property, and place an "X" in the appropriate column.

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Definitions:

- Physical Property: A characteristic that can be observed or measured without changing the substance’s chemical identity. Examples: color, density, melting point, solubility, etc.

- Chemical Property: A characteristic that describes how a substance interacts with other substances to form new substances. These involve chemical changes. Examples: flammability, reactivity with acids, ability to rust, etc.

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Now let’s analyze each item:

1. blue color
→ This is visible without changing the substance.
✔ Physical Property

2. density
→ Mass per unit volume; measurable without altering composition.
✔ Physical Property

3. flammability
→ Ability to burn (undergo combustion), which involves a chemical change.
✔ Chemical Property

4. solubility
→ How well a substance dissolves in a solvent. No chemical change occurs (just physical mixing).
✔ Physical Property

5. reacts with acid to form H₂
→ A reaction producing hydrogen gas indicates a chemical change.
✔ Chemical Property

6. supports combustion
→ Supports burning (e.g., oxygen); this is a chemical behavior.
✔ Chemical Property

7. volume
→ Amount of space occupied; measurable without changing substance.
✔ Physical Property

8. melting point
→ Temperature at which solid turns to liquid; phase change, no new substance formed.
✔ Physical Property

9. reacts with water to form a gas
→ Involves a chemical reaction producing a new substance (gas).
✔ Chemical Property

10. reacts with a base to form water
→ This is a neutralization reaction (acid + base → salt + water). Chemical change.
✔ Chemical Property

11. hardness
→ Resistance to scratching; physical trait.
✔ Physical Property

12. boiling point
→ Temperature at which liquid turns to gas; physical change.
✔ Physical Property

13. can neutralize a base
→ Indicates acidic behavior; involves chemical reaction.
✔ Chemical Property

14. taste
→ Can be sensed without changing substance (though caution: tasting chemicals is unsafe!). Still, it’s a physical observation.
✔ Physical Property

15. conductivity
→ Ability to conduct electricity; depends on structure, not chemical change.
✔ Physical Property

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✔ Final Answer Table:

| # | Property | Physical Property | Chemical Property |
|---|--------------------------------------|-------------------|-------------------|
| 1 | blue color | X | |
| 2 | density | X | |
| 3 | flammability | | X |
| 4 | solubility | X | |
| 5 | reacts with acid to form H₂ | | X |
| 6 | supports combustion | | X |
| 7 | volume | X | |
| 8 | melting point | X | |
| 9 | reacts with water to form a gas | | X |
|10 | reacts with a base to form water | | X |
|11 | hardness | X | |
|12 | boiling point | X | |
|13 | can neutralize a base | | X |
|14 | taste | X | |
|15 | conductivity | X | |

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✔ Summary:
- Physical Properties: 1, 2, 4, 7, 8, 11, 12, 14, 15
- Chemical Properties: 3, 5, 6, 9, 10, 13

This classification reflects whether the property involves a change in the substance’s chemical identity or not.

Parent Tip: Review the logic above to help your child master the concept of chemistry physical and chemical properties worksheet.

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