Question

physical vs chemical properties
a physical property is observed with the senses and can be determined without destroying the object. for example: color, shape, mass, length, and odor are all examples of physical properties.
a chemical property indicates how a substance reacts with something else. the original substance is fundamentally changed in observing a chemical property. for example, the ability of iron to rust is a chemical property. the iron has reacted with oxygen, and the original iron metal is changed. it now exists as iron oxide, a different substance.
classify the following properties as either chemical or physical by putting a check in the appropriate column.

	physical property	chemical property
2. density
3. flammability
4. solubility
5. reacts with acid to form h2
6. supports combustion
7. sour taste
8. melting point
9. reacts with water to form a gas
10. reacts with a base to form water
11. hardness
12. boiling point
13. can neutralize a base
14. luster (shiny)
15. odor

Explanation:

Step1: Recall physical property definition

Physical properties are observed without changing the substance.

Step2: Analyze each property

• Blue color: Observed with eyes, no chemical change, physical.
• Density: Measured without altering substance, physical.
• Flammability: Involves burning, a chemical reaction, chemical.
• Solubility: Just mixing, no new substance formed, physical.
• Reacts with acid to form H₂: Chemical reaction, chemical.
• Supports combustion: Chemical process, chemical.
• Sour taste: Due to chemical composition reacting with taste - buds, chemical.
• Melting point: Change of state without chemical change, physical.
• Reacts with water to form a gas: Chemical reaction, chemical.
• Reacts with a base to form water: Chemical reaction, chemical.
• Hardness: Observed without chemical change, physical.
• Boiling point: Change of state without chemical change, physical.
• Can neutralize a base: Chemical reaction, chemical.
• Luster (shiny): Observed without chemical change, physical.
• Odor: Detected without chemical change, physical.

Answer:

Property	Physical Property	Chemical Property
2. density	√
3. flammability		√
4. solubility	√
5. reacts with acid to form H₂		√
6. supports combustion		√
7. sour taste		√
8. melting point	√
9. reacts with water to form a gas		√
10. reacts with a base to form water		√
11. hardness	√
12. boiling point	√
13. can neutralize a base		√
14. luster (shiny)	√
15. odor	√