**MHS Chemistry
Physical Separation**

What are the relative amounts of sand and table salt in the large flask?

**INSTRUCTIONS**

1. On a separate piece of paper, write a clear procedure for determining the
answer to this question.

2. After the procedure is written, get your teacher to approve and sign it.

3. Set up an empty data table for this lab.

4. Carry out this procedure as carefully as possible.

**ANALYSIS**

1. What is the mass of sand in your sample?

2. What is the mass of salt in your sample?

3. What is the mass % of each part of the mixture

4. What is the mass % of the starting mixture remaining after your procedure?

5. If you did not get “100%” for #4, what do you think happened?

**WHAT TO PASS IN**

You should pass in a complete formal lab report, on exactly one piece of paper.
It should include the usual title section, a purpose, your procedure, your data
table, your calculations, and your analysis. Each person passes in their own
lab.

**STUDENT LEARNING EXPECTATIONS**

**A2** - A Middletown High School graduate will acquire, analyze,
and evaluate information and ideas to solve problems effectively.

**NOTE**

This lab is also a contest. I will be combining all the classes’ data
to find the “average” % composition. The group in each class that
is closest to it’s class average will receive five bonus percentage points.
The group that is closest to the overall average will receive ten bonus percentage
points.

**FOLLOW-UP QUESTION
**For next class, think about this: How can you find the