Pure Substances & Mixtures Flashcards
What is an element?
Give an example.
An element is a pure substance that contains only one type of atom; it is impossible for an element to be separated
Ex: gold
What is a compound?
Give an example.
A compound is a pure substance that contains two or more atoms that have been chemically combined; it can be separated
Ex: carbon dioxide
What is a pure substance?
Give an example.
A pure substance contains only one type of atom
Ex: iron
What is a characteristic property?
Is one that helps us identify a pure substance or the group to which the pure substance belongs
Definition of a physical characteristic property.
This property helps us identify a pure substance without changing the nature of the substance in the process.
Definition of a chemical characteristic property.
This property helps us identify a pure substance, but during the process, the nature of the substance may be changed.
4 examples of char. physical prop. of matter
- Melting point
- Boiling point
- Density
- Solubility
6 examples of char. chemical prop. of matter
- Reaction to litmus paper
- Reaction to cobalt chloride paper
- Reaction of limewater
- Reaction of a glowing wood splint
- Reaction of a burning wood splint
- Reaction to an open flame
Definition of heterogeneous mixture.
Give an example.
Is made up of at least two substances that can be distinguished with the naked eye.
Ex: granite
Definition of homogeneous mixture.
Give an example.
Is made up of at least two substances that cannot be distinguished with the naked eye.
Ex: apple juice
Definition of colloid.
Give an example.
Is a homogeneous mixture in which at least two substances can be distinguished under a magnifying instrument.
Ex: blood, when looked through a microscope we can see red and white cells
Definition of a solution(mixtures).
Is a homogeneous mixture in which it is impossible to distinguish its constituent parts, even under a magnifying instrument
Ex: apple juice
Definition of a solute.
A solute is a substance that can be dissolved into a another substance
Definition of solvent.
Give an example.
A solvent is a substance in which can dissolve a solute.
Ex: water
