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Q: Why do detergent decreases the surface tension?
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Continue Learning about Chemistry

What happens to the surface tension of a liquid when it is heated?

As heat increases the surface tension decreases.


How can you break the attachment of molecules in the surface tension?

The surface tension of water can be broken by adding dishwashing detergent to the water. This can be demonstrated by filling a bowl with water, then floating a needle in it. This may sound almost impossible, but it can be easily achieved by placing the needle on a tissue, then carefully floating it on the water. When the tissue sinks, the needle should remain on the surface. It is prevented from sinking by the water's surface tension. Carefully add one drop of dishwashing detergent, and the needle will sink. You can prove this was due to the surface tension being broken by trying to float the needle again. If you added enough detergent this should be impossible, as detergent acts as a wetting agent and breaks the surface tension.


What happened to the needle when you added 2-3 drops of the detergent solution?

If you have floated a needle on the surface of the water in a glass then adding a little detergent will cause the needle to sink. This is because the presence of the detergent changes the surface tension of the water so that it can no longer support the needle.


How does vapor pressure of water change when a salt is added?

it decreases the surface tension of the water.


What is a force that acts on particles at a liquids surface?

Surface tension. It always tends to acquire minimum surface area thats why water droplets form spherical shape.

Related questions

True or false Addition of a detergent to water increases the surface tension of the water?

False. When detergent or soap is added to water then it surface tension decreases.


Surface tension of water on adding detergent?

Well If you have a pie pan filled with milk and then drop 4 diffrent colors of food coloring droped in but not touching then get a tooth pick with detergent on it and touch it in the foodcoloring will swirl out like tie die in the pan.


Effect of Temperature on Surface Tension?

surface tension decreases with the increase of temperature


How does temperature affect surface tension?

As the temperature rises, surface tension decreases.


What effect does detergent have on surface tension and Why?

There is an effect on Surface Tension when detergent is put in the water. I am doing an experiment for my upcoming Science fair and i am doing a Detergent Powered Boat/Surface Tension...I have tested it many times with and without detergent, when it doesn't have detergent it floats and then sinks after 5 seconds but with detergent it zips through the water...I can not give you the reason for this as i am myself still researching on why this is!


What does alcohol do to surface tension?

it decreases it.


What is the effect of increase of temperature on surface tension?

Surface tension decreases as temperature increases.


What happens to the surface tension of a liquid when it is heated?

As heat increases the surface tension decreases.


Surface tension of water on adding detergent to it?

Decrease


What does rubbing alcohol do to surface tension?

it decreases it.


What does detergent do to the surface tension of water?

It weakens the surface tension of water allowing us to blow BUBBLES!! :D


What phospholipid decreases the surface tension of the alveoli?

surfactant