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identify the following as a chemical property(cp) or physical property …

Question

identify the following as a chemical property(cp) or physical property (pp): 1. the 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
identify the following as physical change (pc) or chemical (cc) changes. 1. nacl (table salt) dissolves in water. 2. ag (silver) tarnishes. 3. an apple is cut. 4. heat changes h₂o to steam. 5. baking soda reacts to vinegar. 6. fe (iron) rusts. 7. alcohol evaporates. 8. ice melts. 9. milk sours. 10. sugar dissolves in water. 11. wood rots. 12. pancakes cook. 13. grass grows. 14. a tire is inflated. 15. food is digested. 16. paper towel absorbs water.
can you recognise the chemical and physical changes that happen all around us? if you change the way something looks, but haven’t made a new substance, a physical change (p) has occurred. if the substance has been changes into another substance, a chemical change (c) has occurred.

  1. an ice cube is placed in the sun. later there is a puddle of water. later still the puddle is gone. 2. two chemical are mixed together and a gas is produced. 3. a bicycle changes color as it rusts. 4. a solid is crushed to a powder. 5. two substances are mixed and light is produced. 6. a piece of ice melts and reacts with sodium. 7. mixing salt and pepper. 8. chocolate syrup is dissolved in milk. 9. a marshmallow is toasted over a campfire. 10. a marshmallow is cut in half.

Explanation:

Brief Explanations

A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. A chemical property is a characteristic that describes how a substance changes into a different substance. A physical change is a change in which the form or appearance of matter changes, but not its chemical composition. A chemical change is a change in which one or more substances are converted into different substances.

  1. Color is a physical property (PP) as it can be observed without changing the substance's identity.
  2. Density is a physical property (PP) as it is a measurable characteristic without altering the substance chemically.
  3. Flammability is a chemical property (CP) as it describes how a substance reacts with oxygen to burn, changing its identity.
  4. Solubility is a physical property (PP) as dissolving is a physical process and doesn't change the substance chemically.
  5. Reacts with acid is a chemical property (CP) as it involves a chemical reaction producing new substances.
  6. Supports combustion is a chemical property (CP) as it relates to a chemical reaction with oxygen.
  7. Sour taste is a chemical property (CP) as it involves chemical interactions with taste - buds changing the chemical state in a sense.
  8. Melting point is a physical property (PP) as it is a characteristic of the substance that can be measured without changing its chemical nature.
  9. Reacts with water is a chemical property (CP) as it involves a chemical reaction forming new substances.
  10. Hardness is a physical property (PP) as it can be measured without altering the substance chemically.
  11. Boiling point is a physical property (PP) as it is a measurable characteristic without chemical change.
  12. Luster is a physical property (PP) as it can be observed without changing the substance's identity.
  13. Odor is a physical property (PP) as it can be detected without a chemical change in the substance.
  14. Reacts with air is a chemical property (CP) as it involves a chemical reaction with components of air.

For changes:

  1. NaCl dissolving in water is a physical change (PC) as it is a physical process of dissociation and no new substance is formed chemically.
  2. Silver tarnishing is a chemical change (CC) as silver reacts with sulfur - containing compounds in air to form silver sulfide.
  3. An apple being cut is a physical change (PC) as it only changes the physical form, not the chemical composition.
  4. Heat changing H₂O to steam is a physical change (PC) as it is a phase - change and no new substance is formed.
  5. Baking soda reacting to vinegar is a chemical change (CC) as it produces carbon dioxide gas and other new substances.
  6. Iron rusting is a chemical change (CC) as iron reacts with oxygen and water to form iron oxide.
  7. Alcohol evaporating is a physical change (PC) as it is a phase - change from liquid to gas without a chemical reaction.
  8. Ice melting is a physical change (PC) as it is a phase - change from solid to liquid without chemical alteration.
  9. Milk souring is a chemical change (CC) as bacteria convert lactose to lactic acid, changing the chemical composition.
  10. Sugar dissolving in water is a physical change (PC) as it is a physical process of dispersion and no new substance is formed chemically.
  11. Wood rotting is a chemical change (CC) as it involves decomposition by fungi and bacteria, forming new substances.
  12. Pancakes cooking is a chemical change (CC) as heat causes chemical reactions in the batter, changing its composition.
  13. Grass growing is a chemical change (CC) as it involves…

Answer:

  1. PP
  2. PP
  3. CP
  4. PP
  5. CP
  6. CP
  7. CP
  8. PP
  9. CP
  10. PP
  11. PP
  12. PP
  13. PP
  14. CP
  15. PC
  16. CC
  17. PC
  18. PC
  19. CC
  20. CC
  21. PC
  22. PC
  23. CC
  24. PC
  25. CC
  26. CC
  27. CC
  28. PC
  29. CC
  30. PC
  31. PC
  32. CC
  33. CC
  34. PC
  35. CC
  36. CC
  37. PC
  38. PC
  39. CC
  40. PC