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Science Chemistery Y8 > Acids And Alkali > Flashcards

Acids And Alkali Flashcards

1
Q

Name 2 examples of an acid

A

Hydrochloric acid and nitric acid

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2
Q

Name 2 examples of an alkali

A

Toothpaste and soap

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3
Q

What is neutralisation?

A

Where you add an acid to a base to make salt and water.

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4
Q

Give an example of an equation of neutralisation.

A

Hydrochloric acid + barium - barium chloride
Sulphuric acid + lithium - lithium sulphate
Nitric acid + sodium - sodium nitrate

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5
Q

What happens to the PH of an acid / alkali when it is neutralised?

A

The PH goes to 7

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6
Q

What is a concentrate?

A

Large amount of acid in comparison to water

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7
Q

What is a dilute?

A

A large amount of water in comparison to acid

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8
Q

What is the salt to this equation?
Hydrochloric acid + lithium

A

Lithium chloride

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9
Q

What is the salt to this equation?
Nitric acid + sodium

A

Sodium nitrate

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10
Q

What ions are present in an acid?

A

Hydrogen ions

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11
Q

What ions are present in an alkali?

A

Hydroxide ion

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12
Q

What is a substance with a PH of less that 7?

A

An acid

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13
Q

What is a substance with a PH of 7?

A

Neutral

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14
Q

What is a substance with a PH of more that 7 ?

A

An alkali

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15
Q

What colours are 1 - 3 on the PH scale?

A

Red

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16
Q

What colour are 4 - 5 on the PH scale?

A

Orange

17
Q

What colour is 6 on the PH scale?

A

Yellow

18
Q

What colour is 7 - 10 on the PH scale?

A

Green

19
Q

What colour is 11 - 12 on the PH scale?

A

Blue

20
Q

What colour is 13 - 14 on the PH scale?

A

Purple

21
Q

What Is 1 - 3 on the PH scale?

A

A strong acid

22
Q

What is 4 - 6 on the PH scale?

A

A weak acid

23
Q

What is 7 on the PH scale?

A

Neutral

24
Q

What is 8 - 10 on the PH scale?

A

Weak alkali

25
Q

What is 11 - 14 on the PH scale?

A

Strong alkali

26
Q

What are the 2 rules for naming salts?

A

1) The first part comes from the base (e.g lithium)
2) The second part comes from the acid (e.g nitric acid)

27
Q

What salt is formed from Hydrochloric acid?

A

Chlorine

28
Q

What salt forms from nitric acid ?

A

Nitrate

29
Q

What salt forms from sulphuric acid ?

A

Sulfate

30
Q

Acid + metal =

A

Salt + hydrogen

31
Q

Acid + metal oxide =

A

Salt + water + carbon dioxide

32
Q

Acid + alkali =

A

Salt + water

Science Chemistery Y8 (1 decks)

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