Introduction to Chemistry

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  • Created by: cbaker11
  • Created on: 19-09-13 18:20
What are the three states of matter? Draw particle pictures for each of them.
Gas, Liquid, Solid
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Describe the difference between a chemical change and a physical change.
Chemical Change - A new substance is formed Physical Change - A substance changes from one state of matter to another.
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How can a substance be changed from one physical state to another?
Heating and Cooling
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What are the names given to the following physical changes: a) Solid to Liquid b) Liquid to Gas c) Gas to Liquid d) Liquid to Solid e) Solid to Gas f) Gas to Solid
a) Melting b) Evaporating c) Condensing d) Freezing e) Sublimation f) Sublimation
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Describe how you would know if a substance has dissolved.
The Solution is Clear/Transparent and you can see sediment at the bottom of the beake
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What is the term used to describe a substance that dissolves?
Soluble
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What is the term that is used to describe a substance that does NOT dissolve
Insoluble
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What is a Solute?
The substance which is dissolved.
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What is a Solvent?
The substance that the solute is dissolved in.
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What is a Solution?
The end result of adding a solute to a solvent.
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What is a Saturated Solution?
A solution where the solute can NOT dissolve anymore so there is a sediment at the bottom of the beaker.
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What is the difference between a Dilute Solution and a Concentrated Solution?
Dilute Solution - a small mass of solute is added to the solvent Concentrated Solution - A larger mass of solute is added to the solvent.
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How can a Solution be made more Dilute?
By adding more Solvent or less Solute
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Name the process by which a soluble solid can be recovered from a solution.
Evaporating
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Name the process by which an insoluble solid can be separated from a liquid.
Filtration
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List 4 things that might be observed to indicate a Chemical reaction had place.
- A new substance is formed - An energy change has taken place - There has been a colour change - You can see precipitation
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What happens in ALL Chemical reactions?
A new substance is ALWAYS formed.
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Describe the difference between an Endothermic and Exothermic reaction.
Exothermic - Heat is given off Endothermic - Heat is taken in.
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What are the gases that make up the air and the percentage of each gas present?
Nitrogen - 80% Hydrogen - 0.00005% Oxygen - 20% Carbon Dioxide - 0.4% Argon - 0.93%
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Other cards in this set

Card 2

Front

Describe the difference between a chemical change and a physical change.

Back

Chemical Change - A new substance is formed Physical Change - A substance changes from one state of matter to another.

Card 3

Front

How can a substance be changed from one physical state to another?

Back

Preview of the front of card 3

Card 4

Front

What are the names given to the following physical changes: a) Solid to Liquid b) Liquid to Gas c) Gas to Liquid d) Liquid to Solid e) Solid to Gas f) Gas to Solid

Back

Preview of the front of card 4

Card 5

Front

Describe how you would know if a substance has dissolved.

Back

Preview of the front of card 5
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