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.

1. blue color
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
15. odor

Explanation:

Physical properties can be observed without changing the substance's chemical identity. Chemical properties involve a change in the substance's chemical nature. Blue color, density, solubility, sour taste, melting - point, hardness, boiling - point, luster, and odor are physical as they can be determined without altering the substance chemically. Flammability, reacting with acid to form H₂, supporting combustion, reacting with water to form a gas, reacting with a base to form water, and being able to neutralize a base are chemical as they involve chemical reactions and changes in the substance.

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	√
15. odor	√