Name: ______Date: ______

HON CHEM Unit 4 Test Review: Classification of Matter

1. Complete the graphic organizer below with the correct vocabulary terms.

2. Name different examples of each of the types of matter below and include a particle diagram of each type of matter.

Example / Particle Diagram / Example / Particle Diagram
Pure Substance / Mixture
Element / Homo-genous Mixture
(Solution)
Compound / Hetero-geneous Mixture

3. Name and define the 6 techniques for separating mixtures that were discussed in class. Include an example of a mixture that could be separated for each technique.

Separation Technique / Description / Example Mixture

4. Identify the pictures below using the following key. Some can have more than 1 letter:

A. Mixture of Elements E. Atoms of an Element I. Atoms of a Solid Element

B. Mixture of Molecules F. Molecules of an Element

C. Mixture of Atoms & Molecules G. Molecules of a Compound

D. Mixture of Atoms H. Solid Compound

e. In the row of pictures above (letter d) how is picture A different from picture D?

5. A student has a sample of octane (a type of fuel) and water mixed together. The melting point of octane is -57°C and its melting point is 125°C. Draw what the temperature time graph would look like is the mixture starts off at room temperature (25°C) and is heated up until the hexane has begun to boil away.

6. In the spaces below, draw what a mixture of nitrogen and hydrogen gases would look like and then draw what the compound ammonia (NH3) would look like.

Mixture Compound

7. In the reaction to form ammonia (NH3), 1 volume of nitrogen gas reacts with 3 volumes of hydrogen gas. Determine how many volumes of ammonia are formed during the reaction and draw it below.

+ ®

8. If you were to assume that all gases were monatomic, draw the chemical reaction that shows hydrogen gas reacts with fluoride gas to produce hydrogen fluoride (HF).

9. How would your picture be different if the gases were diatomic? Explain and draw the new diagram in the space below.

10. Sulfur and oxygen can form several different compounds together. Two different compounds were analyzed and found to have the following mass compositions:

Compound A: 48.09 g of S and 23.99 g of O

Compound B: 73.74 g of S and 73.55 g of O

a. Determine the value of the ratio in each compound. Show your work.

A: ______B: ______

b. How does the mass ratio for compound A compare to the mass ratio of B?

c. Sketch the particle diagrams for the compounds of A and B that account for these mass ratios.

Include the formula for the compound in each diagram.

11. Students were asked to separate a mixture of sugar and sand. They poured water into the original mixture and then poured the water, sugar, & sand mixture through a piece of filter paper. Afterwards they heated the sugar water to evaporate the water and be left with just the sugar. The following measurements were obtained:

Mass of empty beaker: 102.50 g

Mass of plain filter paper: 0.62 g

Mass of beaker + water + sand + sugar: 189.71 g

Mass of filter paper + dry sand: 8.95 g

Mass of beaker + dry sugar: 115.82 g

a. What was the mass of sugar obtained? What was the mass of the sand obtained? Show work.

b. What is the percent composition of the sand? What is the percent composition of the sugar?

c. If you were told that you should have gotten 14.61 g of sugar, what is your percent error?

d. What are some possible errors that you could have caused you to get the value that you did?