Introducing
Your new presentation assistant.
Refine, enhance, and tailor your content, source relevant images, and edit visuals quicker than ever before.
Trending searches
Pure vs Impure Substances
64
Pure vs Impure Substances
Pure vs Impure Substances
Impure Substances
Pure Substances
Heterogeneous Mixtures
A mixture can be separated using a physical change. This can include filtration, distillation, evaporation, dissolve, use of magnets, etc.
A mixture in which components are not evenly mixed so that different parts of the mixture have different composition.
- Each pure substance has its own set of unique set chemical and physical properties which helps identifies it.
- Water has a melting point of 0°C and a boiling point of 100°C. It is also colorless and odorless. Gold however, is yellow in color, solid at room temperature and pressure and is is good conductor of electricity
Pure Substances
Impure Substances
Examples
- A pure substance is a substance that cannot be separated by physical means. eg. filtration, evaporation, distillation or chromatography.
Pure Substances
Homogeneous Mixture
is a mixture in which components are evenly mixed so that every part of the mixture is the same as the other
- A mixture is a combination of two or more elements or compounds that are not chemically combined.
- Making a mixture requires a physical change.
Pure Substance Definition
Examples
WARM UP
Which of these is a homogeneous mixture and which is a heterogeneous mixture?
Elements are made up the same types of atoms. The known elements are listed in the Periodic table. Examples of elements include hydrogen, helium, nitrogen, oxygen, iron and gold.
Compounds are composed of one or more different types of atoms that joined together by chemical bonds. Examples of compounds include water, glucose, methanol, DNA and carbon dioxide.
- A pure substance or chemical substance is a material that has constant composition (is homogeneous) and has consistent properties throughout the sample.
- Examples: tin, sulfur, diamond, water, pure sugar (sucrose), table salt (sodium chloride) and baking soda (sodium bicarbonate).