Oxidation, Reduction, Thermal Decomposition Flashcards

1
Q

What is oxidation?

A

A gain of oxygen.

During combustion both carbon and hydrogen atoms are oxidised.

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2
Q

Which elements tend to be found in fossil fuels?

A

Carbon

Hydrogen

Sulfur

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3
Q

What gas is made when sulfur in fossil fuels burns?

Describe what it is like.

A

Sulfur dioxide.

It is acidic gas and toxic.

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4
Q

Incomplete combustion

A

When there is a lack of oxygen.

Carbon monoxide is formed. (CO)

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5
Q

Carbon monoxide is…

A

…….a toxic gas.

It is colourless and odourless. It attaches to red blood cells and prevents oxygen from being carried.

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6
Q

What gases cause acid rain?

A

Sulfur dioxide

Nitrogen oxides

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7
Q

What are particulates?

A

Tiny solid particles containing soot (carbon) and unburnt fuels.

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8
Q

What is oxidation?

A

Lots of common metals, like iron and aluminium, react with oxygen to form oxides.

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9
Q

What element is used to reduce the oxides of iron and copper to make the metals

A

Carbon removes oxygen from the compound.

It is a reducing agent.

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10
Q

Reduction is………

A

….the loss of oxygen

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11
Q

What do we call it when one compound is heated to produce 2 products?

A

Thermal decomposition.

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12
Q

How do we know that the following reaction is a thermal decomposition reaction?

Hydrogen peroxide –> Water + Oxygen

A

Because one compound is breaking down to produce 2 products.

Hydrogen peroxide –> Water + Oxygen

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13
Q

Copper carbonate (+ heat) –> ?

A

Copper carbonate (+ heat) –> Copper oxide + Carbon Dioxide

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14
Q

Copper carbonate + heat –> Copper oxide + Carbon Dioxide

What is the reactant(s) in this reaction?

A

Copper carbonate

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15
Q

Copper carbonate + heat –> Copper oxide + Carbon Dioxide

How could we test that this gas given off in this reaction is carbon dioxide?

A

Bubble the gas through lime water

If it turns cloudy the gas is carbon dioxide

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