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Yr 9 Chemistry > Patterns Of Reactivity > Flashcards

Patterns Of Reactivity Flashcards

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1
Q

What happens if u add heat to copper

A

Piece of copper turns black and glowed slightly

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2
Q

What happens if u add heat to iron

A

Orange sparks glowed red

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3
Q

What happens if u add heat to magnesium

A

Bright white light and formed a white powder after

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4
Q

Why is lithium, sodium and potassium stored under oil

A

they can react with water and oxygen

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5
Q

Copper, magnesium and iron in order of reactivity

A

Magnesium>iron>copper

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6
Q

Magnesium + oxygen -

A

Magnesium oxide

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7
Q

Iron + oxygen -

A

Iron oxide

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8
Q

Copper + oxygen -

A

Copper oxide

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9
Q

Alkali metals reacting with water similarities

A

-react vigorously
-give off gas
-float
-metal disappears
-moves across surface

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10
Q

What safety precautions are taken when using these metals

A

Safety glasses
metals are stored under oil
Safety screen

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11
Q

What Hazard symbols are on each jar of metal

A

flammable- could catch fore easily
Corrosive- if the metal reacts with water forming an alkali , can also burn tissue

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12
Q

Hydroxides definition

A

The alkali solutions formed as the group 1 metals react with water

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13
Q

Calcium with water observation

A

Sinks and rises, bubbles of gas, vigorous reaction, calcium disappears

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14
Q

Magnesium with water observation

A

A few bubbles of gas, reacts slowly

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15
Q

Copper with water observation

A

doesn’t react

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16
Q

What two things are produced when metals react with water

A

Metal hydroxide + hydrogen

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17
Q

magnesium calcium and copper in order of reactivity most reactive first

A

calcium> magnesium>copper

18
Q

Calcium + water-

A

Calcium hydroxide + hydrogen

19
Q

Magnesium + water -

A

Magnesium hydroxide + hydrogen

20
Q

Copper+ water-

A

No reaction

21
Q

What is usually produced when a metal reacts with an acid

A

Hydrogen

22
Q

Which metals should u not try put into acids

A

Potassium, sodium and lithium bc they are very reactive

23
Q

Aluminium and water observations

A

Reacts slowly with water

24
Q

Aluminium and dilute acid

A

Does react a little bit

25
Q

Why does aluminium resist corrosion

A

It forms a protective oxide layer on its surface and this protects the aluminium

26
Q

Copper strip to silver nitrate =

A

Silver crystals formed on the piece of copper and the colourless solution will turns blue/green colour

27
Q

What does rust do to steel

A

Makes it flaky, weak and dangerous

28
Q

What is silica gel used for

A

To remove moisture from the steel

29
Q

What is the chemical name for rust

A

Hydrated iron lll oxide

30
Q

Name two conditions required for rusting

A

Water and oxygen

31
Q

4 methods to prevent iron from rusting

A

Paint or oil it
Plastic coating
Galvaniseing
Sacrificial prtection

32
Q

How does plastic coating work

A

Prevents air and moisture

33
Q

What is galvanising

A

A layer of zinc

34
Q

Name two metals used for galvanising

A

Iron and chromium

35
Q

What is the cheapest method of preventing moisture

A

High water pressure

36
Q

Give one example of when sacrificial protection is used

A

Zinc bars on ships and magnesium

37
Q

What is copper used for

A

Water pipes

38
Q

Best way to prevent rusting on a gate

A

Oiling

39
Q

Best way to prevent rusting on a hull of a ship

A

Sacrificial protection

40
Q

Best way to prevent rusting on a machinery

A

Oil

41
Q

Best way to prevent rusting on a iron nail

A

Galvanising

Yr 9 Chemistry (4 decks)

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