How does detergent repel oil
Two test tubes, pipette, test tube holder or container to place the test tubes.
Water, oil, detergent.
Two test tubes are filled with water and about 4-5 drops of oil. One test tube is used for comparison at the end of the experiment, so that it can be set aside for the time being.
The other test tube is shaken and then left to stand for a moment. You can see a temporary fragmentation of the oil layer. However, the oil soon settles on the water again.
A few drops of washing-up liquid are then added and the test tube is shaken again.
Mixing of the two substances can now be observed. The oil no longer settles on the water, but is distributed in the finest droplets in it. An emulsion was created.
The other test tube is used for comparison.
Oil and water are two immiscible liquids. This is due to the hydrophobic properties of fats and the lipophobic properties of water. The two repel each other.
One liter of fat has a density of around 0.9-0.97 g / cm and thus weighs 900-970 g. One liter of water weighs exactly one kilogram. Thus, oil is lighter and floats on water.
An emulsion is formed when one of the two liquids in two or more immiscible liquids is distributed in the other in the form of small droplets. This condition is stabilized by adding emulsifiers, as these reduce the surface tension. ("Emulsifiers are surface-active substances that have a polar, water-soluble [hydrophilic] and a non-polar, fat-soluble [lipophilic] side").
In this experiment, the detergent acts as an emulsifier. When this is added, the oil is distributed in the form of small droplets in the water. It emulsifies.
A naturally occurring emulsion known to everyone is milk.
When it comes to washing or rinsing, emulsions have the advantage that they are easy to rinse off. The dirt does not settle again, but remains dissolved in the washing water.
- How do you define a high tenor
- What is it like to be Azerbaijanis?
- Many Dutch people take drugs
- The gravity becomes weaker
- Which books would improve my French?
- What are Wade's rules
- Can a retailer refuse to sell
- Can I create and sell mobile apps
- How can I understand this sentence
- How does Marvel make films so consistent
- Who makes Call of Duty
- Where is the object created in C ++
- Has Belgium ever won the World Cup
- If TQWL 10 is confirmed
- Will my eyebrows grow back
- Should set up rental control nationwide in California
- What is an industry PE
- How is beef eating seen by Indians
- Which stethoscope is best for doctors
- How much essential scaffolding is
- Iran and Israel are terrible friends
- Why was Yemen destroyed?
- How do your parents shape your personality
- What is the importance of the user experience