Transcript Properties of water Labs Explanation

Properties of water Labs
Explanation
Water Labs
• There are 7 labs to do
• Each bucket is labeled with the lab and all the
directions are in the bucket. Read the
DIRECTIONS!!!
• Read your blue lab sheet carefully before you
start each lab.
• Your groups will go at its own pace, grab a
bucket when you are ready to go to the next
one.
• Return the bucket the exact way you found it!!
Clean up!!
PENNIES
1. Grab a penny from the container.
2. Using the red water and the eyedropper. Add as many
drops of water that you can before the water falls off.
RELEASE THE DROPS CAREFULLY
3. Dry off your penny and repeat using the blue alcohol
counting as many drop as you can put on top of the
penny.
4. Dry off your penny. Smear a tiny amount of detergent on
the head of the penny and THEN add as many drop of
water on top of your penny as possible.
TOOTHPICKS
1. Take two toothpicks and
balance them on the surface
of the beaker, parallel to each
other.
2. Place one drop of detergent
between the two toothpicks.
3. Observe
4. Rinse out glass when done.
ALCOHOL and WATER
1. Measure out 25mL of water in a graduated cylinder.
2. Measure out 25mL of alcohol in another graduated
cylinder.
3. When you combine the 2 liquids, what do you think the
combined volume will be? Write that on you lab sheet.
4. Now, Combine the 2 liquids in one of the cylinders.
5. Observe.
SUGAR CUBE
1. Pour 10 mL of red water into the glass bowl.
2. Place the sugar cube into the water.
3. Observe.
4. Repeat using a 2nd sugar cube
BLOCKS
1. Calculate the volume of the blocks. (you only need to do
this once because they are all the same size) Use the
formula (l x w x h) and calculate it in cm. Place this
number in your chart.
2. Find the mass of each cube. Place this number in your
chart.
3. Volume = l x w x h
2.5 cm
DENSITIES OF WATER
Part A: Ice and Water.
• Observe the container with ice and water.
• What can you assume about the density of ice compared
to water.
Part B: Salt water and Fresh Water
• The blue water is salt water and the green water is fresh
water.
• CAREFULLY drop a hard boiled egg in each of the waters.
Observe the differences in the way the egg reacts.
OIL and WATER
1. Pour 25 mL of water in
2. Pour 25mL of oil in
1 of the cups
1 cup.
3. Drop a scoop of salt in one water cup and one oil cup.
Observe.
4. Drop a scoop of baking soda in one water cup and one oil
cup. Observe.
5. Drop 3 drops of food coloring in one water cup and one oil
cup. Observe.
USE ONLY 2
CUPS
Pennies
Pennies
Cohesion: water
sticking to water
Sugar Cubes
Sugar cubes
Sugar Cube
Adhesion-water sticking
to other things
Cohesion-water sticking
to water
CAPILLARY ACTION
Density of water
Density of Water
The density of ice is less than the
density of water
SALT WATER
FRESH WATER
Salt water has a higher density
than fresh water
Alcohol and Water
Universal Solvent - polarity
25 mL of
+
Alcohol
25 mL of
water =
?
Oil and Water
Oil and Water
OIL
Water is polar
Oil is Non polar
Food Coloring is polar
Water
Density of Blocks
Mass= 24 grams
Volume is 15.6
2.5 cm
Density =
Mass/Volume
Density of Blocks
Mass= 24 grams
Volume is 15.6
2.5 cm
Density =
Mass/Volume
24/15.6 = 1.5
Will it sink or float
in water?
Toothpicks
Toothpicks
Cohesion caused the toothpicks to float (water sticking
to water creates surface tension)
Detergent breaks the surface tension