Chemistry
Number range on pH scale
0-14
The average pH?
5.5
What number is neutral on the pH scale?
7
What is a pure substance?
A chemical combination of matter in definite (fixed) proportions.
What is a solution?
A physical mixture of two or more substances in a solvent
What is a solute?
A substance that is dissolved in a solution.
Below 7 on the pH scale is considered
Acidic
What is Mattter?
Anything that has mass and takes up space
What is an atom?
Basic unit of matter
What is physical properties?
Characteristics that can be determined without a chemical reaction and do not involve a chemical change in the substance
What is a compound molecules?
Chemical compounds of two or more atoms of different elements
What is oxide?
Compound containing oxygen
What is bases?
Compounds consisting of hydrogen, a metal, and oxygen
What is acids?
Compounds consisting of hydrogen, a nonmetal, such as nitrogen, a metal and oxygen
What is salts?
Formed by a chemical reaction of a acid and a base
What is a emulsifier?
Ingredients that bring 2 normally incapable materials together and binds them into stable mixture
Oil-loving is called
Lipophilic
What is a immiscible liquid?
Not capable of being mixed to form a stable solution
What is a suspension/Colloids?
Physical mixtures of undissolved particles in a liquid
What are the 3 physical mixtures?
Solutions, Suspensions, and emulsions
What is surfactant?
Substances that allow oil + water to mix
What is a element?
The simplest form of chemical mattter
What is inorganic?
The study of all substances that do NOT contain carbon
What is chemistry?
The study of the composition of matter and the changes that matter undergoes
What is emulsion?
Unstable mixture of 2 or more substances plus a "special" ingredient
What is the unviersal solvent?
Water
Above 7 on the pH scale is considered?
alkaline
Water-loving is called
hydrophilic
What is the pH scale?
measures how acidic or alkaline a substance is
What is a electron?
negatively charged particle
The skin acid mantle?
pH 4.5-6.2
What is a molecule?
two or more atoms held together by chemical bonds
