Question

name ______key

physical property

1. observed with senses
2. determined without destroying matter

chemical property

1. indicates how a substance reacts with something else
2. matter will be changed into a new substance after the reaction

identify the following as a chemical (c) or physical property (p):
______1. blue color
______2. density
______3. flammability (burns)
______4. solubility (dissolves)
______5. reacts with acid
______6. supports combustion
______7. sour taste
______8. melting point
______9. reacts with water
______10. hardness
______11. boiling point
______12. luster
______13. odor
______14. reacts with air

Explanation:

Step1: Recall physical property def

Physical properties are observed with senses and determined without destroying matter.

Step2: Recall chemical property def

Chemical properties indicate how a substance reacts with something else and matter is changed into a new substance after the reaction.

Step3: Analyze blue color

Blue color is observed with eyes, so it's a physical property (P).

Step4: Analyze density

Density can be determined without changing the substance chemically, so it's a physical property (P).

Step5: Analyze flammability

Flammability involves a substance burning and changing into new substances, so it's a chemical property (C).

Step6: Analyze solubility

Solubility is about a substance dissolving without changing its chemical nature fundamentally, so it's a physical property (P).

Step7: Analyze reacts with acid

Reacting with acid changes the substance into new substances, so it's a chemical property (C).

Step8: Analyze supports combustion

Supporting combustion leads to a chemical reaction and new substances, so it's a chemical property (C).

Step9: Analyze sour taste

Sour taste is observed with taste - sense and doesn't change the substance chemically, so it's a physical property (P).

Step10: Analyze melting point

Melting point is determined without changing the chemical composition, so it's a physical property (P).

Step11: Analyze reacts with water

Reacting with water changes the substance into new substances, so it's a chemical property (C).

Step12: Analyze hardness

Hardness can be determined without chemical change, so it's a physical property (P).

Step13: Analyze boiling point

Boiling point is determined without chemical change, so it's a physical property (P).

Step14: Analyze luster

Luster is observed with eyes and doesn't involve chemical change, so it's a physical property (P).

Step15: Analyze odor

Odor is observed with smell - sense and doesn't change the substance chemically, so it's a physical property (P).

Step16: Analyze reacts with air

Reacting with air changes the substance into new substances, so it's a chemical property (C).

Answer:

1. P
2. P
3. C
4. P
5. C
6. C
7. P
8. P
9. C
10. P
11. P
12. P
13. P
14. C