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Chemistry > Chemical changes > Flashcards

Chemical changes Flashcards

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1
Q

What forms metal oxides?

A

Metal+oxygen

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2
Q

What is the type of reaction because the metals gain oxygens?

A

Oxidation

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3
Q

OIL RIG

A

Oxidation is loss of electrons, Reduction is gain of electrons

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4
Q

What happens when metals react with other substances?

A

Metal atoms form positive ions

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5
Q

What is the order of reactivity?

A

Potassium, Sodium, Lithium, Calcium, Magnesium, Zinc, Iron, Copper

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6
Q

Potassium’s reaction with water

A

Violent

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7
Q

Sodium reaction with water

A

Very wuick

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8
Q

Lithium reaction with water

A

Quick

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9
Q

Calcium reaction with water?

A

More slow

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10
Q

Calcium reaction with dilute acid

A

very wuick

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11
Q

Magnesium reaction with dilute acid

A

quick

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12
Q

Zinc reaction with dilute acid

A

Fairly slow

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13
Q

Iron reaction with dilute acid

A

More slow

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14
Q

Copper reaction with dilute acid

A

Very slow

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15
Q

what can a more reactive metal do to a less reactive metal?

A

Displace it from a compound

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16
Q

Where is gold found

A

In the earth

17
Q

What are most metal found as?

A

compounds that require chemical reactions to extract the metals

18
Q

How are metals less reactive that carbon extracted

A

By reduction with carbon

19
Q

What do acids and metals react to form?

A

Salt and hydrogen

20
Q

What are reactions between acids and metals called

A

Redox reactions

21
Q

What are acids neutralised by and what does it form?

A

Alkalis and bases to form salts and water

22
Q

what are acids neutralised by to produce salts water and carob dioxide

A

Metal carbonates

23
Q

How are soluble salts made?

A

Reacting acids with a solid insoluble substance( metals, metal oxides, hydroxides, carbonates

24
Q

Why is the ionic equation of a neutralisation reaction?

A

H+ + OH- -> H2O

25
Q

What is a strong acid?

A

Completely ionised in aqueous solution

26
Q

What is a weak acid?

A

Partially ionised in aqueous solution

Chemistry (8 decks)

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