Reactions Topic 1 Flashcards by Izziexxxfrogz 🐸🥑 | Brainscape

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

Q

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

A

Iron oxide

Q

The thermite reaction is used to

A

Weld train tracks together

Q

What colour is copper oxide

A

Black

Q

What colour is carbon

A

Black

Q

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

A

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

Q

The equation for the reaction of mixture carbon and copper oxide

A

Copper oxide + carbon -> copper + carbon dioxide

Q

What is the equation for a thermite reaction

A

Aluminium + iron oxide = iron + aluminium oxide