Random 1
Of all the elements known to science today, how many occur naturally on Earth?
There are 98.
What is exposed metal rusting an example of?
A chemical change.
How many elements are known to science today?
There are 118.
What is the simplest form of chemical matter?
An element.
Any substance that occupies space and has weight is called what?
Acids would most likely be used for what purpose?
To exfoliate the skin.
What is TRUE of creams, lotions, masks, and makeup pertaining to chemicals?
They contain chemicals whether they come from natural sources or from ingredients manufactured in a laboratory.
When combining two or more immiscible substances that will not mix, what should you add for the substances to combine?
Incorporate an emulsifier.
What is true of solutions?
They are stable mixtures.
How should you store certain products and chemicals that are incompatible?
You should store them away from each other.
If you were to leave the freezer open all night, all of the ice will melt. This is a result of what kind of reaction?
An endothermic reaction.
What are the drops of lavender extract when mixed into the water?
They are solutes.
What were the first surfactants?
They were soaps.
What does the pH scale measure?
It measures the acidity and alkalinity.
When immiscible liquids are combined, they form what?
They form suspensions.
What does a reducing agent do?
Add hydrogen to a chemical compound.
Why would you be made aware of any hazards associated with the products you work with and sell in your business?
Because the products are registered with the EPA.
What kind of products should you use on very dry, dehydrated, and irritable skin?
You should use products that are slightly alkaline.
What is true of all liquids?
They are either miscible or immiscible.
Why is understanding pH important for the beauty and wellness professional?
Because it affects the hair, skin, and nails.
What is true today of the disposal of many of the chemicals used in salons, spas, and barbershops?
Most states and counties do not have regulations in place.
All acids owe their chemical reactivity to what?
The hydrogen ion.
Acid–alkali neutralization reactions occur when an acid is mixed with an alkali in equal proportions, balancing the total pH and forming water (H2O) and what?
A salt.
What is an example of a compound molecule? (Hint: It's common)
Common table salt.
What is a big requirement of OSHA for salon owners?
Having an SDS (Safety Data Sheet) available for every chemical used.