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Lava Lamp Experiment

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by

amaris diaz

on 20 March 2014

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Transcript of Lava Lamp Experiment

Besides creating your own fun lava lamp minus the other toxic chemicals the purpose of this experiment is to observe and find out how water, oil and Alka seltzer will react with on another.
Independent Variable: Dependent Variable: Control:
Purpose/ Objective
Hypothesis:
2 small clean plastic bottles
2 big sized plastic bottles
water
Hot plat
Water
Vegetable oil
Alka Seltzer
Food coloring
Procedure
Alka Seltzer
Vegetable oil
Bottle
Movement of water
Pour room temperature water 3/4 of the bottle into one small bottle.
Heat up water on a hot plate and poor the water 3/4 the size of the bottle into the other small bottle.
Use a funnel (or not) to slowly pour the vegetable oil into the bottle until it is almost full. You may have to wait awhile for the two to separate.
Add 10 drops of food coloring to the bottle. The drops will pass through the oil and then mix with the water.
Break a seltzer tablet in half and drop it into the bottles.
March 19, 2014
Chemistry Period: 1
Lina Perea
Amaris Diaz
Who invented the lava lamp?
Background Information
Expirement/ Observation

A lava lamp is a decorative novelty item, invented by the British accountant Edward Craven-Walker in 1963. The lamp contains blobs of colored wax inside a glass vessel filled with clear or translucent liquid; the wax rises and falls as its density changes due to heating from the light bulb underneath the glass container. The reason why they call them lava lamps is because the wax resembles pahoehoe lava.

The lava lamp contains three parts, the base, the lamp and the top cap.

When turned off and cold, the lava is hard at the bottom of the glass container and can barely be seen. The turned on light bulb heats both the element and the lava. Lava expands with heat, becomes less dense than the water and rises to the top. Away from the heat, the lava cools and becomes denser than the water and falls.
We observed that when we added the oil to the water it stayed at the top instead of mixing with the water.
When we added the food coloring it formed blobs in the oil but then slowly sunk into the water and mixed with it.
When we added the alka seltzer it sunk to the bottom and began to dissolve in the water creating bubbles in the oil.
With the hot water the Alka Seltzer dissolved a lot faster and created more blobs and bubbles.
When we used a bigger bottle there were more bubbles than in the small bottle.
When we used more Alka Seltzer there were more bubbles.
Lava Lamp Experiment
If you add Alka Seltzer with water, oil and food coloring then the Alka Seltzer will begin to fiz thus creating blobs of food coloring (similar to a real Lava Lamp) to move rapidly around the bottle.
Food coloring
Alka Seltzer
Materials
Pour room temp water 3/4 into two small water bottles.
Slowly pour the vegetable oil to the top of the bottle.
Add 10 drops of food coloring
Break a seltzer tablet in half and drop it into one bottle
Add tow full alka seltzer tablets into the remaining tablet.
Pour room temperature water 3/4 into a small and large bottle
Use a funnel to slowly pour the vegetable oil to the top into the bottle.
Add 10 drops of food coloring
Break a seltzer tablet in half abd drop it into the bottle.
Data:
Temperature of room temp water: 20 degrees C
Heated water: 50 degrees C
Time it took to dissolve in a normal small bottle: 38 seconds
Time it took in the heated water: 23 seconds
Time it took in a big bottle: 31 seconds
Time it took with more Alka Seltzer: 34
Question and Answers
Does the temperature of the water affect the reaction?
Yes, the temperature does affect the reaction. The hot water made the Alka Seltzer dissolve faster and caused the experiment to produce more bubbles/ blobs.
Does the size of the bottle affect how many blobs are produced?
Yes, the size of the bottle does affect the amount of blobs that are produced. The bigger the bottlle is the more blobs were created and then expanded and broke apart to reach everywhere in the bottle.
Does the amount of the tablet pieces affect the number of blobs created?
The amount of tablet pieces does affect the number of blobs by creating more from the dissolving Alka Seltzer.
Conclusion
We conclude that the amount of Alka Seltzer, the size of the bottle and the temperature of the bottle does affect the way the make shift lava lamp will produce the bubbles.
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