Mix it Up--Pure Substances & Mixtures!
You will investigate the characteristics and interactions of pure substances and mixtures while developing
your laboratory skills by using a variety of scientific equipment & procedures. Work with your partner to
observe the interactions between various types of matter. There will be eight stations to visit. The order
you visit the stations is not important. At each station, carefully observe what happens and record your
results. DUMP & RINSE OUT ALL LIQUID MIXING CONTAINERS. CLEAN UP YOUR STATION.
Materials:
• test tubes to hold the various materials
• a beaker to measure out liquids and to hold the test tubes upright
• rubber stoppers to seal the test tubes
• stirring rods to stir up the different liquid materials
• scoopula to spoon out the solid into the test tube. One scoop
= ½” up the scooper.
Procedure(s)
Follow the same procedure at stations 1-6. At stations 7 & 8, the procedures are different
(read the directions at that station).
1. Pour about 100 ml of liquid into a beaker.
2. Transfer some of the liquid into a clean test tube to a depth of three fingers (about 10 mL).
3. Using a clean measuring spoon, add one scoop of the solid to the liquid in the test tube.
4. Put the stopper in the test tube. Hold the stopper with your thumb, turn the tube upside down, and
shake it.
4. Record what you observe at each station in a chart.
5. Please dump and rinse out your mixing test tubes and beakers before leaving each station.
6. Place the test tubes upside down in a rack or one of the beakers to dry.
What
1.
2.
3.
4.
5.
6.
7.
8.
is being mixed at each station:
Mix salt with room temperature water.
Mix sugar with room temperature vinegar.
Crush an antacid tablet into powder. Mix the powder with room temperature water.
Mix pepper with room temperature water. Mix a second batch in a shallow pan, then,
add one drop of dish soap.
Mix flour with room temperature water.
Mix one scoop of dry chocolate powder with cold tap water and one scoop of the powder
with hot water.
(Read Carefully!) Prepare two test tubes, one with cold water and one with hot water.
Add some juice crystals to each test tube. DO NOT SHAKE.
(Read Carefully!) Prepare two test tubes, one 1/3 full with sugar, one 1/3 full with hot water.
Carefully add all the sugar to the water, stirring occasionally as you do.
What you’ll do at each station:
Station #
1.
Mixing salt with room temperature water.
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2.
Pour about 100 ml of room temp water into a beaker.
Transfer some of the water into a clean test tube to a depth of three fingers high (about 10 mL).
Using a clean scoopula, add one scoop of the solid to the liquid in the test tube.
Put the stopper in the test tube. Hold the stopper with your thumb, and shake it a few seconds
Record what you observe at each station in a chart.
Please dump and rinse out your mixing test tubes and beakers before leaving each station.
Place the test tubes upside down in a rack or one of the beakers to dry.
Mixing sugar with room temperature vinegar.
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3.
Pour the liquid into a clean test tube to a depth of three fingers high (about 10 mL).
Using a clean scoopula, add one scoop of the solid to the liquid in the test tube.
Put the stopper in the test tube. Hold the stopper with your thumb, and shake it a few seconds
Record what you observe at each station in a chart.
Please dump and rinse out your mixing test tubes and beakers before leaving each station.
Place the test tubes upside down in a rack or one of the beakers to dry.
Mixing antacid (powdered) with room temperature water
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4.
Crush an antacid tablet into a powder using the mortar and pestal.
Pour about 100 ml of room temp water into a beaker.
Transfer some of the water into a clean test tube to a depth of three fingers high (about 10 mL).
Using a clean scoopula, add one scoop of the solid to the liquid in the test tube.
Put the stopper in the test tube. Hold the stopper with your thumb, and shake it a few seconds
Record what you observe at each station in a chart.
Please dump and rinse out your mixing test tubes and beakers before leaving each station.
Place the test tubes upside down in a rack or one of the beakers to dry.
Mixing pepper with room temperature water.
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Pour about 100 ml of room temp water into a beaker.
Transfer some of the water into a clean test tube to a depth of three fingers high (about 10 mL).
Using a clean scoopula, add one scoop of the solid to the liquid in the test tube.
Put the stopper in the test tube. Hold the stopper with your thumb, and shake it a few seconds
Mix a second batch in a shallow pan, then add one drop of dish soap
Record what you observe at each station in a chart.
Please dump and rinse out your mixing test tubes and beakers before leaving each station.
Place the test tubes upside down in a rack or one of the beakers to dry.
Station #
5.
Mixing flour with room temperature water.
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6.
Pour about 100 ml of room temp water into a beaker.
Transfer some of the water into a clean test tube to a depth of three fingers high (about 10 mL).
Using a clean scoopula, add one scoop of the solid to the liquid in the test tube.
Put the stopper in the test tube. Hold the stopper with your thumb, and shake it a few seconds
Record what you observe at each station in a chart.
Please dump and rinse out your mixing test tubes and beakers before leaving each station.
Place the test tubes upside down in a rack or one of the beakers to dry.
Mixing hot chocolate powder with cold tap water and with hot water.
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7.
Pour about 100 ml of cold water into a beaker and 100 ml of hot water into another beaker.
Transfer some of the liquids into clean test tubes to a depth of three fingers high (about 10 mL).
Using a clean scoopula, add one scoop of the solid to the liquid in the test tube.
Put the stopper in the test tube. Hold the stopper with your thumb, and shake it a few seconds
Record what you observe at each station in a chart.
Please dump and rinse out your mixing test tubes and beakers before leaving each station.
Place the test tubes upside down in a rack or one of the beakers to dry.
Mixing powdered drink mix with cold tap water and hot water.
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8.
(Read Carefully!)
Pour about 100 ml of cold tap water into a beaker and 100 ml of hot water into another beaker.
Transfer some of the liquids into clean test tubes to a depth of three fingers high (about 10 mL).
Using a clean scoopula, add one scoop of the solid to the liquid in EACH test tube.
Do NOT shake!
Record what you observe at each station in a chart.
Please dump and rinse out your mixing test tubes and beakers before leaving each station.
Place the test tubes upside down in a rack or one of the beakers to dry.
Mixing suger with hot water
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(Read Carefully!)
Pour about 100 ml of hot water into a beaker.
Transfer some of the hot water into a test tube to a depth of 3 fingers high. (about 10 ml)
Pour sugar into a clean dry test tube to a depth of about 3 fingers high.
Carefully add all the sugar to the hot water, stirring occasionally with the stir stick as you do.
Record what you observe at each station in a chart.
Please dump and rinse out your mixing test tubes and beakers before leaving each station.
Place the test tubes upside down in a rack or one of the beakers to dry.