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Nat 5 Chemistry > Metals and Electrochemistry > Flashcards

Metals and Electrochemistry Flashcards

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1
Q

What two metals rust?

A

Iron and Steel

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2
Q

How quickly does potassium corrode?

A

In seconds

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3
Q

How quickly does copper corrode

A

In years

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4
Q

How quickly does gold corrode?

A

Gold never corrodes

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5
Q

What two things are ESSENTIAL for corrosion/ rusting

A
  • water
    *oxygen
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6
Q

What two things speed up corrosion/ rust but don’t cause it?

A

Acid
Salt

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7
Q

What are the cheap ways to protect metal?

A

Painting and Oil&Grease

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8
Q

What are the expensive ways to protect metal?

A

Electroplating and Galvasing

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9
Q

What is electroplating?

A

Electroplating is when you coat reactive metals in less reactive metals.

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10
Q

some properties of Gold.

A
  1. Its shiny
  2. It is unreactive
  3. It is ductile
  4. It is malleable
  5. It is a good conductor of heat + electricity
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11
Q

where can gold be found?

A

the earth and rivers, this is because it is so unreactive

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12
Q

what is an ore?

A

an ore is a compound from which a metal can be extracted

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13
Q

the alkali metals are very

A

reactive

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14
Q

Does calcium react with water?

A

yes

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15
Q

metal + water =

A

metal hydroxide + hydrogen

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16
Q

What do metals produce when reacted with acid?

A

salt + hydrogen

17
Q

magnesium + hydrochloric acid ->

A

magnesium chloride + hydrogen

18
Q

What do metals produce when reacted with oxygen?

A

metal oxide

19
Q

what metal is at the top of the reactivity series

A

potassium

20
Q

what is the second metal on the reactivity series

A

sodium

21
Q

what is the third metal on the reactivity series

A

lithium

22
Q

what is the fourth metal on the reactivity series

A

calcium

23
Q

what is the 5th metal on the reactivity series

A

magnesium

24
Q

what is the 6th metal on the reactivity series

A

aluminium

25
Q

what is the seventh metal on the reactivity series

A

zinc

26
Q

what is the eighth metal on the reactivity series

A

iron

27
Q

what is the ninth metal on the reactivity series

A

copper

28
Q

what is the 10th metal on the reactivity series

A

silver

29
Q

what is the last metal on the reactivity series

A

gold

Nat 5 Chemistry (5 decks)

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