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 1 of the cups 2. Pour 25mL of oil in 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

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 Water Water is polar Oil is Non polar Food Coloring is polar

Density of Blocks 2.5 cm Mass= 24 grams Volume is 15.6 Density = Mass/Volume

Density of Blocks 2.5 cm Mass= 24 grams Volume is 15.6 Density = Mass/Volume 24/15.6 = 1.5 Will it sink or float in water?

Toothpicks

Cohesion caused the toothpicks to float (water sticking to water creates surface tension) Detergent breaks the surface tension