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Chemistry GCSE > Oxygen (2) > Flashcards

Oxygen (2) Flashcards

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1
Q

What percentage of the air is oxgen

A

20%

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2
Q

How is oxygen made in the lab

A

It is made from hydrogen peroxide as it decomposes into water and oxygen

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3
Q

Hydrogen peroxide equation

A

2H₂0₂ –> 2H₂0 + O₂

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4
Q

The decomposition of hydrogen peroxide is really slow but can be increased with a sprinkle of the catalyst, _____________ oxide

A

Manganese

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5
Q

You can collect oxygen that’s produced over water by using a _____ _______

A

Gas syringe

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6
Q

When an element is burnt in air it reacts with the oxygen to form an __________

A

Oxide

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7
Q

Oxides can be either acidic or ________

A

Basic

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8
Q

______________ burns with a bright white flame in air and the white powder that is formed is ______________ _________. Magnesium oxide is slightly _________ when it’s dissolved in water

A

Magnesium
Magnesium oxide
Alkaline

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9
Q

Magnesium oxide is slightly ____________ when it’s dissolved in water

A

Alkaline

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10
Q

Carbon will burn in air if it’s very strongly heated. It has an __________ flame and it’s produces carbon dioxide gas. Carbon dioxide is slightly __________ when it’s dissolved in water

A

Orangey/yellow

Acidic

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11
Q

Equation for Magnesium oxidising

A

2Mg + O₂ —> 2MgO

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12
Q

Equation for Carbon oxidising

A

C + O₂ –> Co₂

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13
Q

Equation for Sulfur oxidising

A

S + O₂ —> So₂

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14
Q

Sulfur burns in air or oxygen with a ________ ________ flame.

A

Pale blue

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15
Q

Sulfur produces sulfur ____________

A

Sulfur dioxide

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16
Q

Sulfur dioxide is ___________ when it’s burnt in water

A

Acidic

17
Q

In general, metal oxides are ________ and non-metal oxides are __________. Some metal oxides react with water to form ____________ solutions. It is important to point out that some metal oxides do not react with water. They test neutral in water because they are _____________ but they are still bases because they react with ________.

A 
Basic
Acidic
Alkaline
Insoluble
Acids
18
Q

Metal oxides are ________

A

Basic

19
Q

Non-metal oxides are __________

A

Acidic

20
Q

Some metal oxides react with water to form ____________ solutions

A

Alkaline

21
Q

Some metal oxides do not react with water. They test neutral in water because they are _____________ but they are still bases because they react with ________.

A

Insoluble

Acids

Chemistry GCSE (28 decks)

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