Chemistry Chemical Changes

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  • Created by: ZGrimwood
  • Created on: 08-12-19 11:54
What is the pH scale?
A measure of how acidic or alkaline a solution is
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What does a neutral substance have a pH of?
7
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Where are the acidic solutions in the pH scale?
0-6
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Where are the alkaline solutions in the pH scale?
8-14
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What is the reaction between acids and bases?
Acid * base - salt * water
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Whats the difference between Strong and Weak Acids?
Strong acids ionise completely in water but weak acids do not fully ionise
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What is the Reactivity Series?
A list of metals in order of their reactivity towards other substances
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How are the reactivity of metals determined?
By how easily they lose electrons
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What is Oxidation?
Gain of Oxygen
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What is Reduction?
Loss of Oxygen
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What is a Redoc Reaction?
When electrons are transferred
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A more reactive metal will displace a ... metal from its compound
Less reactive
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What is an example of a displacement reaction?
iron * copper sulfate - iron sulfate * copper
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What is Electrolosis?
A reacton which is caused by an electrical current
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What are Positive Ions attracted to?
Cathode
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What are Negative Ions attracted to?
Anode
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What do Half Equations show?
The reactions at the electrode
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Other cards in this set

Card 2

Front

What does a neutral substance have a pH of?

Back

7

Card 3

Front

Where are the acidic solutions in the pH scale?

Back

Preview of the front of card 3

Card 4

Front

Where are the alkaline solutions in the pH scale?

Back

Preview of the front of card 4

Card 5

Front

What is the reaction between acids and bases?

Back

Preview of the front of card 5
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