C7 Redox Reactions Flashcards

1
Q

What is oxidation?

A

Oxidation is loss of electrons
Oxidation is gain of oxygen
Oxidation is loss of hydrogen

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2
Q

What is reduction?

A

Reduction is gain of electrons
Reduction is loss of oxygen
Reduction is gain of hydrogen

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3
Q

What is the oxidation state of an element?

A

Zero

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4
Q

What do oxidation states add up to in a neutral compound?

A

Zero

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5
Q

What are oxidising agents?

A

It is a substance that oxidises another atom or ion causing it to lose electrons consequently it reduces itself gaining that electron

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6
Q

Do oxidising agents oxidation number become more positive or negative and why?

A

They become more negative as they are being reduced as a electron is being gained

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7
Q

What are reducing agents?

A

They donate electrons to the species being reduced, therefore it loses electrons and is oxidised.

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8
Q

Do reducing agents oxidation number become more positive or negative and why?

A

They become more positive as a electron is being lost so therefore there is an increase in oxidation number.

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9
Q

What is the method to tackled half equations and redox reactions?

A

Write down species before and after reaction
Balance everything apart from oxygen and hydrogen
Balance oxygen with water
Balance water with hydrogen
Balance charges with electrons
Compare both equations and make sure at the end of the redox equation no electrons are left

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10
Q

What is the oxidation state of hydrogen in hydrides?

A

-1

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11
Q

What is the oxidation state of oxygen in peroxides?

A

-1

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