Answer 4 is very similar to Answer 1, which is confusing.
I made some changes to the English you may want to use:
1. The hydrophobic ends of the soap
molecules attach to the oil molecules, while the hydrophilic ends of the soap
molecule attach to the water molecules.These drops of oil are suspended in
the water.
This is how soap cleans our hands - it causes drops of grease and dirt
to be pulled off your hands and become suspended in water. These drops are
washed away when you rinse your hands.
2.
Soap breaks up the water in to
smaller drops, which then mix with the oil. These drops are washed away when
you rinse your hands.
3.
Hydrophobic ends of soap molecule
all attach to the water molecules, while the hydrophilic ends attach to the oil
molecules.
These drops of oil are suspended in the water. This is how
soap cleans our hands - it causes drops of grease and dirt to be pulled off
your hands and become suspended in water. These drops are washed away when you
rinse your hands.
4.
Soap breaks up the oil in to smaller
drops, which then mix with the water. The hydrophobic ends of the soap molecules
all attach to the oil, while the hydrophilic ends of the soap molecules attach
to the water molecules. These drops of oil are suspended in the oil. This is
how soap cleans our hands.
I like the question, the topic related to everyday life and shows that chemistry happens around us everyday, not just in a lab. I liked the video and the way you used to explain what happened, good job.
It will be more useful to add a simulation and pictures, which shows how soap works.
I added a link (contains video with simulation that explain how soap works) and photos that can be useful for you.
Also it will be more attractive if you use "attractive title", like: "How do soap clean your hands ?" , or "Discover the secret of the soap action".
Your point on map is very interesting and related to the topic.
In Chemistry, soap is a salt of a
fatty acid. Consumers mainly use soaps as surfactants for washing, bathing, and
cleaning.
The earliest recorded evidence of
the production of soap-like materials dates back to around 2800 BC in ancient
Babylon. A formula for soap consisting of water, alkali, and cassia oil was
written on a Babylonian clay tablet around 2200 BC.
The Ebers papyrus (Egypt, 1550 BC) indicates the ancient Egyptians bathed
regularly and combined animal and vegetable oils with alkaline salts to create
a soap-like substance. Egyptian documents mention a soap-like substance was
used in the preparation of wool for weaving.
In the reign of Nabonidus (556–539 BC), a recipe for soap consisted of uhulu,
cypress [oil] and sesame [seed oil] "for washing the stones for the
servant girls".
Synthetic detergents operate by similar mechanisms to soap.
A detergentis a surfactantor
a mixture of surfactants with "cleaning properties in dilute solutions."These
substances are usuallyalkylbenzenesulfonates, a family of compounds that are similar to soapbut
are more soluble in hard water, because the polar sulfonate(of
detergents) is less likely than the polar carboxyl (of soap) to bind to calcium
and other ions found in hard water. In most household contexts, the term detergentby
itself refers specifically tolaundry detergentordish detergent, as opposed to hand soapor other types of cleaning agents.
Detergents are commonly available as powders or concentrated solutions.
Detergents, like soaps, work because they areamphiphilic: partly hydrophilic(polar)
and partly hydrophobic(non-polar). Their dual nature facilitates the
mixture of hydrophobic compounds (like oil and grease) with water. Because air
is not hydrophilic, detergents are alsofoaming agentsto
varying degrees.
i liked the topic , it relates an every day product to chemistry and demonstrates an interesting phenomenon.
i have a few remarks:
1-the answers are very long and they look too similar , it may confuse the person reading.
2- your point on the map talked about the origin of the name soap, and it mentioned the roman empire , but it was located in panama in south america, why is that? why did you put the point there?
3- you need to add animation or some images or a video to the point on the map to make it more informative
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