Classifying Matter printable pdf download

Classifying Matter

Name:

Block:

Date:

Classifying Matter

Chemistry 11

Assignment

1. Explain the differences between a “MIXTURE” and a “PURE SUBSTANCE”. Give an example of

each.

________________________________________________________________________

2. Describe the difference between a homogeneous and heterogeneous mixture. Give an example of each.

Homogeneous: looks the same throughout (one phase)

Ex. Salt water

Heterogeneous: different parts if the mixture can be seen (more than one phase)

Ex. Trail mix

3. Assume you have 10g of pure gold. Should you refer to the gold as an atom or an element? Why?

Element, an atom is only a single particle of the element. In 10g of a sample there will be LOTS of

atoms.

4. Which of an Element (E), Compound (C), Solution (S), or Mechanical Mixture (MM) are possible

classifications for the following? (There may be more than one answer for each example).

a. A clear liquid which can be boiled away to leave a white solid.

__S__

b. A collection of solid particles, some of which are white, and some of which are red.

_MM__

c. A solid which melts at 170

_E or C_

d. A gas.

E or C or S

e. A liquid.

E or C or S

f. A liquid which boils away completely at 136

C. When the liquid is strongly heated in a closed

container, a yellow gas and a black solid are produced. __C__

5. Which substance is the solute in each of the following?

a. Water containing 5% acetic acid (this mixture is commonly called “vinegar”).

_____acetic

acid______

b. Tincture of iodine (a small amount of solid iodine mixed with alcohol).

___iodine_____

c. A mixture containing 60% alcohol and 40% chloroform.

____chloroform_______

d. A solution containing 900g of silver nitrate in 100g of water.

___silver

nitrate____

Classifying Matter