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Additional Chemistry > Salts And Electrolysis > Flashcards

Salts And Electrolysis Flashcards

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0
Q

Acids

A

Substances that produce hurst often ions when added to water

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1
Q

Pure water is… pH?

A

Neutral pH of 7

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2
Q

Aqueous solution

A

Substance dissolved in water

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3
Q

Bases

A

React with acids and neutralise them

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4
Q

Alkalis

A

Bases that dissolve in water to make alkaline solutions

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5
Q

Alkalis produce what ions

A

Hydroxide ions

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6
Q

pH scale

A

Vales from 0-14

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7
Q

Acidic have what pH

A

Low 0-2

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8
Q

Alkaline have what pH

A

Very high 12-14

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9
Q

Indicators

A

Different colours in acidic and alkaline solutions

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10
Q

Which indicators call tell us the pH of a solution

A

Universal indicator and full-range Indicator

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11
Q

What happens when an acid reacts with a base

A

Neutralisation reaction takes place and produces a salt and a water

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12
Q

What can be made from a metal with an acid

A

Some salts can be made by the reaction of a metal with an acid producing hydrogen gas as well as salt

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13
Q

How can we make soluble salts

A

By reacting an acid with an alkali

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14
Q

What compound is produced in every neutralisation reaction

A

Water

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15
Q

Precipitation

A

An important way of removing some metal ions from industrial waste

16
Q

Electrolysis

A

Process that used electricity to break down ionic compounds

17
Q

Electrolyte

A

The substance that is broken down

18
Q

Negative ions lose/gain at the electrodes

A

Lose electrons

19
Q

When negative ions lose electrons at the positive electrode to become neutral what is this called

A

Oxidation

20
Q

Gaining electrons is called

A

Reduction

21
Q

OILRIG

A

Oxidation Is Loss (of electrons)

Reduction Is Gain (of electrons)

22
Q

Aluminium oxide is electrolysed to..

A

Manufacture aluminium

23
Q

What is mixed with aluminium oxide to lower it’s melting point

A

Cryolite

24
Q

What form at the negative electrode when extracting aluminium

A

Aluminium

25
Q

What forms at the positive electrode when extracting aluminium

A

Oxygen

26
Q

Brine is

A

A solution of chloride in water

27
Q

When we electrolyse brine we get three products

A

Chlorine, gas and sodium hydroxide solution

28
Q

Electroplating

A

Uses electrolysis to put a thing coating of metal onto an object

29
Q

Describe how you would silver plate a small piece of copper jewellery

A

The copper jewellery is used as the negative electrode

Additional Chemistry (4 decks)

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