acids, bases and salts Flashcards

1
Q

indicator

A

substances which change colour when added to acids and alkalis

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2
Q

what is the most well-known indicator

A

litmus

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3
Q

what colour does litmus turn in acids

A

red

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4
Q

what colour does litmus turn in alkalis

A

blue

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5
Q

what indicaator is most used in the labatory

A

universal indicator

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6
Q

what does universal indicator show

A

the pH of the solution

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7
Q

what do acids produce when dissolved in water

A

hydrogen ions

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8
Q

what do alkalis produce when dissolved in water

A

hydroxide ions

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9
Q

what is a base that dissolves in water

A

alkali

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10
Q

when does a neutralisation reaction occur

A

when an acid and alkali cancel eachother out

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11
Q

neutralisation reactions always produce

A

salt and water

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12
Q

what is created when acids react with metals

A

salt and hydrogen gas

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13
Q

what happens during the reaction between acids and metals

A
  • bubbling
  • temperature rise
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14
Q

what do acids reacted with alkalis make

A

salt and water

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15
Q

the reactions of acids with alkalis is

A

exothermic

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16
Q

acids and carbonates make

A

salt, water and carbon dioxide gas

17
Q

the reaction between acids an carbonates is

A

exothermic