POP QUIZ
1. What is the curve formed by liquid in a graduated cylinder?
2. List 4 ways to separate a mixture.
WHAT’S THE MATTER
In this activity you and your group members will be investigating the properties
of matter we have focused on in Chapter 16. In this lab you will be classifying
matter, measuring it, as well as recording boiling points. This is a lab
grade and group participation will be assessed using your peer evaluation
forms.
Materials needed per group:
4 test tubes
Salt
Pepper
Isopropyl Alcohol
3 Beakers
50mL Graduated Cylinder
Funnel
Watch glass
Filter Paper
Hot Plate
Thermometer
Lab Safety Concerns:
-SAFETY GLASSES MUST BE WORN AT ALL TIMES.
-NO DRINKING OR EATING IN LAB.
-DO NOT CONSUME ANY LAB MATERIALS.
-DISPOSE OF ALL MATERIALS INTO WASTE JUG.
Preparation
Choose 2 group members to measure 2 grams of salt and
add to each test tube labeled 1-3. Then measure 1 gram of pepper and add
it to test tube labeled number 4. The third group member needs to measure
40mL of Isopropyl Alcohol under the fume hood using the graduated cylinder.
This should immediately be poured into beaker number 1 and the graduated
cylinder rinsed with water. The fourth group member will then use the graduated
cylinder to measure 40mL of water and then pour into beaker number 2.
Activity 1
Pour the salt from test tube number 1 into beaker number
1 (Isopropyl Alcohol). Observe and record in your lab report the state of
the contents and the volume. Agitate the contents of the beaker and again
record your observations. Pour the contents into the waste jug in the fume
hood and rinse it for reuse in activity 4.
Activity 2
Pour the salt from test tube number 2 into beaker number
2 (water). Record your observations then agitate and record your observations.
Activity 3
In beaker number 3 add the contents from test tube 3 (salt) and test tube
4 (pepper). Record the state of the contents in your lab report and then
agitate contents thoroughly. Again observe and record your findings. Add
the contents to beaker number 2. Stir thoroughly and record your observations.
Activity 4
Place the filter paper inside the funnel. Holding the
funnel over beaker number 1 (cleaned) filter the contents from activity 3
(beaker number 3). Take the liquid recovered after filtration and pour small
amount into the watch glass until it is half full. Place the watch glass
containing the liquid onto the hotplate and evaporate the liquid. Record
your observations during this activity in your lab report. When your water
begins to boil and evaporate record the temperature. This is the boiling
point.
Activity 5
Take your cleaned watch glass and add water until it is
half full. When the water begins to boil record the temperature in your lab
report along with any other observations. This is the boiling point.
