Cosmetic Chemistry

Question 1

What is a physical change? Give an example.

Answer 1

Change in form or physical properties of a substance without the formation of a new substance
ex: ice changing to water/water turning into steam

Question 2

What is a chemical change? Give an example

Answer 2

change in the chemical composition of a substance where a new substance is formed having different properties from the original
example: iron turning into rust or wood turning into ash

Question 3

What are the 3 states i’d matter? Describe each

Answer 3

solid: has a definite size, volume, and shape
liquid: has definite size but no shape
gas: has no definite size or shape

Question 4

What are physical properties of matter?

Answer 4

color, odor, weight, density, specific gravity, melting point, boiling point, and hardness

Question 5

Hydrogen

Answer 5

• colorless, orderless,tasteless gas
• lightest element
• found in chemical

Question 6

Oxygen

Answer 6

• most abundant element on earth
• colorless, orderless, tasteless gas
• 1/2 of Earth’s crust, 1/2 rock, 1/5 of air, 90% of water

Question 7

Water

Answer 7

• most abundant of all substances
• 75% of earths surface
• 65% of human body

Question 8

what is a solution? what type of mixture is it?

Answer 8

uniform mixture of 2 or more mutually miscible substances.

physical mixture

Question 9

exfoliants aid in doing what for the skin?

Answer 9

aid with extractions

Question 10

what does ph stand for?

Answer 10

potential hydrogen- relative degree of acidity or alkalinity and is measured on scale of 0-14