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S2 Science > Awesome Acids > Flashcards

Awesome Acids Flashcards

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1
Q

What is the number range of the pH scale?

A

1-14

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2
Q

What does the pH scale measure?

A

The acidity or alkalinity of a substance

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3
Q

What is the pH range for acids?

A

Less than 7

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4
Q

What is the pH range for alkalis?

A

Greater than 7

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5
Q

True or false? The pH scale can only measure in whole numbers.

A

False

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6
Q

Name 3 indicators used in the lab

A

pH paper universal indicator red cabbage indicator

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7
Q

What is the pH value for neutral solutions?

A

7

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8
Q

Name 2 ways of neutralising an acid

A

Dilution with water Reacting with an alkali

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9
Q

What are the 3 ways of extracting metals

A

Heating Heating with carbon Electrolysis

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10
Q

What do we call the substance formed when iron reacts with oxygen and water?

A

Rust

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11
Q

What are produced when a metal reacts with water?

A

An alkali and hydrogen

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12
Q

What are produced when a metal reacts with an acid?

A

A salt and hydrogen

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13
Q

What is the test for oxygen?

A

It relights a glowing splint

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14
Q

What is the test for hydrogen?

A

It burns with a pop

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15
Q

What are the products of neutralisation?

A

A salt plus water

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16
Q

What type of substance would you take if you had acid indigestion?

A

A substance with a pH above 7

17
Q

Name 2 metals that do not react with oxygen

A

Gold Silver Platinum

18
Q

name 4 metals that react with water

A

Potassium Sodium Lithium Calcium

19
Q

what is produced when metals react with oxygen?

A

A metal oxide

20
Q

What is an ore?

A

A naturally occuring metal compound

21
Q

What is displacement?

A

When a metal replaces another less reactive metal in a compound

22
Q

What is the reactivity series?

A

A table of metals with most reactive at top and least reactive at bottom

23
Q

Name 2 metals that do not react with acids

A

Copper Silver Gold Mercury Platinum

24
Q

What is meant by neutralisation?

A

The pH value moves towards and reaches 7

25
Q

How do you test for pH value?

A
  1. Add some suitable indicator to substance 2. Match colour to appropriate colour chart 3. Read off pH value matching that colour
26
Q

Do strong acids have a higher or lower pH than weak acids?

A

Lower

27
Q

Do strong alkalis have a higher or lower pH than weak alkalis?

A

Higher

28
Q

What type of substance would be used to treat an alkaline wasp sting?

A

A substance with a pH below 7

29
Q

What are produced in a neutralisation reaction?

A

A salt plus water

S2 Science (8 decks)

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