Chemistry - Mixtures

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  • Created by: Qian Ru
  • Created on: 06-09-13 04:49
What is a mixture?
A mixture consists of 2 or more substances which are not joined joined together by a chemical reaction.
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What is a pure substance?
A pure substance contains only 1 element or 1 compound.
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State 1 way a mixture can be formed.
A mixture can be formed by elements.
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State 1 way a mixture can be formed.
A mixture can be formed by elements and compounds.
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State 1 way a mixture can be formed.
A mixture can be formed by compounds.
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What are alloys?
Alloys are mixtures are metallic elements.
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What is 1 property of a mixture?
A mixture can be separated into its components by physical methods such as magnetic attraction.
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What is 1 property of a mixture?
A mixture has the properties of the substances that make it up.
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What is 1 property of a mixture?
A mixture does not have fixed melting and boiling points.
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What is 1 property of a mixture?
Substances in a mixture can be mixed in any proportion.
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What is 1 property of a mixture?
No heat or light is given put/taken in when a mixture is formed.
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What does it mean by 'no heat or light is given off/taken in when a mixture is formed'?
It means that no chemical reactions took place when a mixture is formed.
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State a difference between a mixture and a compound.
No chemical reactions take place when a mixture is formed while a chemical reaction takes place when a compound is formed.
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State a difference between a mixture and a compound.
The constituents of a mixture can be separated from one another by physical means while the constituents (elements) of a compound can only be separated by chemical reactions.
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State a difference between a mixture and a compound.
The proportion of the constituents in a mixture can vary while the elements in a compound are always combined in a fixed proportion by mass.
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State a difference between a mixture and a compound.
The properties are the same as those of the constituents in a mixture while the properties are different from those of the elements in the compound.
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State a difference between a mixture and a compound.
The melting and boiling point of the mixture vary according to the composition while the melting and boiling point of the compound are fixed.
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Is air a mixture? Why or why not?
Air is a mixture because no chemical reaction takes place when the gases in the air are mixed. The properties of air are also the same as its constituents elements. Air can be separated into its different components by fractional distillation.
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Other cards in this set

Card 2

Front

What is a pure substance?

Back

A pure substance contains only 1 element or 1 compound.

Card 3

Front

State 1 way a mixture can be formed.

Back

Preview of the front of card 3

Card 4

Front

State 1 way a mixture can be formed.

Back

Preview of the front of card 4

Card 5

Front

State 1 way a mixture can be formed.

Back

Preview of the front of card 5
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