Chemistry C2 Additional Science

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Substances with a pH of less than 7 are?
Acids
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Substances with a pH higher than 7 are?
Bases (when dissolved in water known as alkalis)
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How are salts made?
When an acid reacts with a base, carbonate or metal
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What colour does acid turn the universal indicator?
Red (strong) or orange or yellow (weak)
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What do bases do when reacted with acids?
Neutralise the acid and produce salt and water
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What are bases usually?
Metal oxides or hydroxides
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What is an alkali?
Bases that dissolve in water
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What colour does an alkali turn the universal indicator?
Dark blue/purple (strong), blue/green (weak)
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What pH do neutral solutions have?
7
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What colour do neutral solutions turn universal indicator?
Green
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What is an ion?
Charged particle
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How is an ion formed?
When atoms lose or gain electrons
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What does (l) mean?
Liquid state
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What does (aq) mean?
Dissolved in water
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What ions do acids make when dissolved in water?
Aqueous Hydrogen (Remember: Acid= H+(aq))
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What ions do alkalis make when dissolved in water?
Aqueous Hydroxide (Remember: Alkali = OH-(aq))
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How does a neutralisation reaction occur?
When the H+(aq) ions form an acid which reacts with the alkali formed by the OH-(aq) ions.
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What is the product of a neutralisation reaction?
Water
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What product is formed from this reaction ( acid + metal oxide)
Salt + water
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acid + metal hydroxide =?
salt +water
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acid + metal =?
salt + hydrogen
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How can hydrogen be detected?
visually by bubbles, and detected by a lighted splint
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What acid is used to produce a chloride salt?
Hydrochloric acid
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Nitrate salt?
Nitric acid
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Sulfate salt?
Sulphuric acid
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Other cards in this set

Card 2

Front

Substances with a pH higher than 7 are?

Back

Bases (when dissolved in water known as alkalis)

Card 3

Front

How are salts made?

Back

Preview of the front of card 3

Card 4

Front

What colour does acid turn the universal indicator?

Back

Preview of the front of card 4

Card 5

Front

What do bases do when reacted with acids?

Back

Preview of the front of card 5
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