Soapy water
Soapy water
What affect does adding soap to water have on surface tension?
Research:
"Soaps and detergents include surfactants, that reduce the surface tension of the liquid. This allows the liquid to have a good contact with the material and to remove the dirt from it efficiently." (Kibron.com)
"Hydrogen bonding between water molecules leads to many interesting consequences at the visible, macroscopic level. For example: the boiling point of water, its surface tension, and it's ability to dissolve salts are all related to hydrogen bonding." (Sciencebuddies.com)
"When you add soap to the water, you reduce the surface tension." (Pbskids.org)
Hypothesis:
I think that if you add soap to water, it will reduce the surface tension.
Procedure:
Step one: Gather materials.
A penny, two droppers, two half cups of water,a paper towel, and a bottle of dish soap.
Step two: Slowly stir a tablespoon of dish soap into half a cup of water.
Step three: Fill one dropper with plain room temprature water.
Step four: Drip water slowly onto penny recording how many drops it will hold.
Step five: Refill the now empty dropper with soapy water.
Step six: Repeat step four with the soapy water.
Step seven: Record and graph results.
Observations:
On the tails side facing up, the results were as followed.
Regular water: 13 drops, 14 drops, and 14 drops.
Soapy water: 11 drops. 8 drops, and 9 drops.
Data:
Type of water
Test one
Test two
Test three
Regular water
13 drops
14 drops
14 drops
Soapy water
11 drops
8 drops
9 drops
Conclusions:
My conclusion is that regular water has more surface tension than soapy water. This proves my hypothesis right.
Application:
As for real life application, this test is useful for things like dishwater. Less surface tension in soapy water allows the cleaner to get closer to a dirty dish and get dirt and greese off easier.
What affect does adding soap to water have on surface tension?
Research:
"Soaps and detergents include surfactants, that reduce the surface tension of the liquid. This allows the liquid to have a good contact with the material and to remove the dirt from it efficiently." (Kibron.com)
"Hydrogen bonding between water molecules leads to many interesting consequences at the visible, macroscopic level. For example: the boiling point of water, its surface tension, and it's ability to dissolve salts are all related to hydrogen bonding." (Sciencebuddies.com)
"When you add soap to the water, you reduce the surface tension." (Pbskids.org)
Hypothesis:
I think that if you add soap to water, it will reduce the surface tension.
Procedure:
Step one: Gather materials.
A penny, two droppers, two half cups of water,a paper towel, and a bottle of dish soap.
Step two: Slowly stir a tablespoon of dish soap into half a cup of water.
Step three: Fill one dropper with plain room temprature water.
Step four: Drip water slowly onto penny recording how many drops it will hold.
Step five: Refill the now empty dropper with soapy water.
Step six: Repeat step four with the soapy water.
Step seven: Record and graph results.
Observations:
On the tails side facing up, the results were as followed.
Regular water: 13 drops, 14 drops, and 14 drops.
Soapy water: 11 drops. 8 drops, and 9 drops.
Data:
Type of water
Test one
Test two
Test three
Regular water
13 drops
14 drops
14 drops
Soapy water
11 drops
8 drops
9 drops
Conclusions:
My conclusion is that regular water has more surface tension than soapy water. This proves my hypothesis right.
Application:
As for real life application, this test is useful for things like dishwater. Less surface tension in soapy water allows the cleaner to get closer to a dirty dish and get dirt and greese off easier.