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Chemistry > Acids And Bases > Flashcards

Acids And Bases Flashcards

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1
Q

pH of acids

A

Less than 7

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2
Q

pH of alkalis

A

More than 7

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3
Q

Colours of acid on pH scale

A

Red orange yellow green(light)

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4
Q

Colour of alkali on pH scale

A

Blue purple

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5
Q

What is an alkali

A

Alkalis are soluble bases

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6
Q

How can an alkaline solution be formed

A

An alkaline solution can be formed when a metal oxide is dissolved in water

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7
Q

How can an acidic solution be formed

A

An acidic solution can be formed when a non-metal oxide is dissolved in water

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8
Q

Can acidic and alkaline solutions conduct?

A

Yes because they have lots that are free to carry charge

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9
Q

Hydrochloric acid

A

HCI . H + (aq) Cl - (aq)

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10
Q

Sulfuric acid

A

H2S04 IIIII 2H+(aq)) 5042 - (aq)

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11
Q

What ions do alkalis have?

A

OH- hydroxide ions

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12
Q

What ions do acids have

A

H+ hydrogen ions

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13
Q

What happens when you add water to an acidic solution

A

When an acidic is diluted with water the concentration of H+ ions decreases and the pH of the solution increases towards 7

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14
Q

What happens when water is added to an alkali

A

When an alkali is diluted by water the concentration of OH- ions decreases. This causes the pH of the alkali to fall towards 7

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15
Q

What is a neutralisation reaction?

A

A neutralisation reaction is a chemical reaction wherein an aced and an alkali are reacted together to produce a salt and water

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16
Q

What are the three reactants (excluding acids) used In neutralisation reactions

A

Alkali, metal carbonates, metal oxides

17
Q

Neutralisation with an alkali…

A

Acid + alkali → salt + water

18
Q

Neutralisation with a metal oxide

A

Acid + metal oxide → salt + water

19
Q

Neutralisation with a metal carbonate…

A

Metal carbonate + acid → salt + water + carbon dioxide

20
Q

Soluble salts can be made…

A

By reacting an acid with an insoluble base ( usually metal oxide/ hydroxide )

21
Q

An insoluble salt can be made…

A

By reacting two bistable solutions together to form a precipitate

Chemistry (8 decks)

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