Honors Chemistry Homework Packet

Phase Change

Name the substance(s) that are a liquid at 105°C

______

Name the substance(s) that are a solid at 7°C

______

Name the substance(s) that are a gas at -200°C

______

Which colorless substance is a liquid at -30°C?

______

Which colorless substance is a gas at 60°C?

______

Which colorless substance is a solid at -150°C?

______

Name the substance(s) that are a gas at 460°C

______

What is the color of the substance(s) that is a solid at 85°C

______

What is the color of the substance(s) that is a gas at -15°C

______

Classification of Matter

Please fill in the matter triangle using the words from the word bank. You must also give the definitions and one example for each of the words in the word bank. The top of the triangle will have the most general term and become more specific as you move downward. The left of the triangle will have the most ordered term and become more disordered as you move to the right.

Word Bank / Definition / Example
Matter
Pure substance
Molecule
Solutions
Heterogeneous mixture
Homogeneous mixture
Element
Mixture
Compound
Atom

Compound or Mixture

Identify each as a mixture or a compound. For each mixture further classify it as homogeneous or heterogeneous.

  1. Soda ______
  2. Candle Wax______
  3. Fog______
  4. Ink______
  5. An egg______
  6. Ice______
  7. Gasoline______
  8. Spaghetti sauce______
  9. Glass______
  10. Table sugar______
  11. River water______
  12. Cough syrup______
  13. Blood______
  14. Peanut butter______
  15. Motor oil______

Chemical or Physical Property

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.

Property / Physical Property / Chemical Property
Blue color
Density
Flammability
Solubility
Reacts with acid to form H2
Supports combustion
Sour taste
Melting point
Reacts with water to form a gas
Reacts with a base to form water
Hardness
Boiling point
Can neutralize a base
Luster
Odor

Chemical or Physical Change

Directions: For each of the following, determine whether a chemical or physical change is taking place:

  1. A hot dog is cooked.
  2. Chemical or physical change?
  3. Your reason:
  1. Thousand Island dressing and mayonnaise are mixed to make “secret sauce” for hamburgers.
  2. Chemical or physical change?
  3. Your reason:
  1. Water is boiled in preparation for making pasta.
  2. Chemical or physical change?
  3. Your reason:
  1. Old ham goes bad in the refrigerator.
  2. Chemical or physical change?
  3. Your reason:
  1. A rock star gets a tattoo on his forehead.
  2. Chemical or physical change?
  3. Your reason:

In a physical change, the original substance still exists; it has only changed in form. In a chemical change, a new substance is produced. Energy changes always accompany chemical changes.

Directions: Classify the following as being a physical or chemical change.

  1. Sodium hydroxide dissolves in water. ______
  2. Hydrochloric acid reacts with potassium hydroxide to produce a salt, water, and heat. ______
  3. A pellet of sodium is sliced in two. ______
  4. Water is heated and changed to steam. ______
  5. Potassium chlorate decompresses to potassium chloride and oxygen gas. ______
  6. Iron rusts. ______
  7. When placed in H2O, a sodium pellet catches on fire as hydrogen gas is liberated and sodium hydroxide forms. ______
  8. Evaporation. ______
  9. Ice melting. ______
  10. Milk sours. ______
  11. Sugar dissolves in water. ______
  12. Wood rotting. ______
  13. Pancakes cooking on a griddle. ______
  14. Grass growing in a lawn. ______
  15. A tire is inflated with air. ______
  16. Food is digested in the stomach. ______
  17. Water is absorbed by a paper towel. ______

Determine if the following properties are intensive (I) or extensive (E)

___1. Mass

___2. Density

___3. Boiling Point

___4. Volume

___5. Length

Determine if the following changes are chemical (C) physical (P)

___1. Water is heated and changed to steam

___2. Iron rusts

___3. Sugar dissolves in water

___4. Water is absorbed by a paper towel

___5. Pancakes cooking on a griddle

Determine if the following properties are chemical (C) or physical (P):

___1. Color

___2. Boiling point

___3. Can neutralize a base

___4. Density

___5. Reacts with water violently

Determine if the following mixtures are homogeneous (M) or heterogeneous (T):

___1. Ink

___2. Crunchy Peanut Butter

___3. Oatmeal Raisin Cookie

___4. Kool-Aid

___5. Blood

Determine if the following is an element (E), compound (C), or mixture (M):

___1. Fe

___2. CO

___3. Mn + CoCl3

___4. H

___5. Al2(SO4)3