Reactions Topic 1 Flashcards by Izziexxxfrogz 🐸🥑

Q

How much oxygen is in the air

A

21%

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Q

How much nitrogen is in the air

A

78%

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Q

How much argon is in the air

A

0.9%

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Q

How much carbon dioxide is in the air

A

0.037

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Q

Reactions of oxygen

A

Respiration
Rusting
Combustion

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Q

Uses of oxygen

A

Breathing apparatus
Welding
Rocket fuel

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Q

What is a catalyst

A

Speeds up a chemical reaction without being used up e.g magnesium dioxide

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Q

Equation for finding oxygen

A

Magnesium dioxide
Hydrogen peroxide——————————>water + oxygen

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Q

Test for oxygen

A

Relights a glowing splint

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Q

Test for carbon dioxide

A

Turns limewater cloudy when bubbled into it

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Q

Uses for carbon dioxide

A

Fire extinguishers
Fizzy drinks
Dry ice

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Q

Equation for carbon dioxide

A

Calcium carbonate + hydrochloric acid -> calcium chloride +water + Carbon dioxide

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Q

Test for hydrogen

A

Burning splint makes squeaky pop

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Q

Uses for hydrogen

A

Margarine
Rocket fuel
Clean fuel

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Q

M.A.S.H

A

Metal + acid = salt + hydrogen

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Q

Equation for finding hydrogen

A

Magnesium+ hydrochloride acid -> magnesium chloride + hydrogen

Q

Exothermic

A

A reaction that gives out heat

Q

Endothermic

A

A reaction that takes heat

Q

Oxidation

A

Oxygen is added

Q

Reduction

A

Oxygen is taken away

Q

Redox reaction

A

Reduction and oxidation taking place in the same reaction

Q

Special ingredient in biological powders

A

Biological enzyme

Q

In the thermite reaction the two reactants are

A

Iron oxide and aluminium

Q

The thermite reaction is a very exothermic/endothermic reaction

A

Exothermic

The reactant ……………… is reduced to molten iron

Iron oxide

The thermite reaction is used to

Weld train tracks together

What colour is copper oxide

Black

What colour is carbon

Black

What do you see when you heat the mixture of copper oxide and carbon

It glows red/brown and on cooling we can see red/brown specs of copper

The equation for the reaction of mixture carbon and copper oxide

Copper oxide + carbon -> copper + carbon dioxide

What is the equation for a thermite reaction

Aluminium + iron oxide = iron + aluminium oxide