H Chemistry - Unit 1 - 1c - Oxidising and Reducing Agents
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19 Terms
What is reduction?
Reduction is a gain of electrons by a reactant in any reaction
What is oxidation?
Oxidation is the loss of electrons by a reactant in any reaction
What does OILRIG stand for?
Oxidation
Is
Loss
Reduction
Is
Gain
What occurs in a redox reaction?
In a redox reaction, reduction and oxidation take place at the same time
What is an oxidising agent?
An oxidising agent is a substance that accepts electrons
What is a reducing agent
A reducing agent is a substance that donates electrons
How do elements with low electronegativities tend to form ions?
Elements with low electronegativities tend to form ions by losing electrons
How do elements with high electronegativities tend to form ions?
Elements with high electronegativities tend to form ions by gaining electrons
What elements usually act as a reducing agent?
Elements with low electronegativities usually act as reducing agents
What elements usually act as oxidising agents?
Elements with high electronegativities usually act as oxidising agents
Which group do the strongest reducing agents belong to?
The strongest reducing agents belong to group 1
What group do the strongest oxidising agents belong to?
The strongest oxidising agents belong to group 7
What is an example of molecule that is an oxidising agent?
Hydrogen peroxide is an example of a molecule that is an oxidising agent
What are examples of group ions that are strong oxidising agents in acidic solutions?
Examples of group ions that are strong oxidising agents in acidic solutions are;
Dichromate ions
Permanganate ions
What is an example of a gas that can be used as a reducing agent?
An example of a gas that can be used as a reducing agent is carbon monoxide
What are the uses of oxidising agents?
The uses of oxidising agents are;
Killing fungi and bacteria
Inactivating viruses
Use as bleach for clothes or hair
What does the electrochemical series represent?
The electrochemical series represents a series of reduction reactions
Where are the strongest oxidising agents found?
The strongest oxidising agents are found at the bottom of the left hand column of the electrochemical series
Where are the strongest reducing agents found?
The strongest reducing agents are found at the top of the right hand column of the electrochemical series