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Chemistry GCSE (EDEXCEL) > Acids and Alkali > Flashcards

Acids and Alkali Flashcards

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1
Q

What is an acid?

A

A substance with a pH below 7

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2
Q

What is a base?

A

A substance with a pH above 7

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3
Q

What is an alkali?

A

A soluble base

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4
Q

What is a neutral solution?

A

A solution with a pH of 7

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5
Q

What are the four different indicators?
(At GCSE lvl)

A

Litmus paper, Phenolphalein, Methyl Orange, Universal Indicator

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6
Q

What is the colour of Litmus paper in acid?

A

Red

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7
Q

What is the colour of Litmus paper in alkali?

A

Blue

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8
Q

What is the colour of Phenolphalein in acid?

A

Colourless

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9
Q

What is the colour of Phenolphalein in alkali?

A

Purple

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10
Q

What is the colour of Methyl orange in acid?

A

Red

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11
Q

What is the colour of Methyl orange in alkali?

A

Orange

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12
Q

What is the colour of Universal Indicator in acid?

A

Red

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13
Q

What is the colour of Universal Indicator in Alkali?

A

Purple

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14
Q

Dissociation

A

The splitting up of atoms(ions)
(HCl –> H+ + Cl-

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15
Q

Strong acid

A

An acid that fully dissociates its ions

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16
Q

Weak acid

A

An acid that partially dissociates its ions

17
Q

What is the equation for concentration?

A

amount dissolved/ volume of solution

18
Q

Acid + Alkali

A

Salt + Water

19
Q

Acid + Base

A

Salt + Water

20
Q

Acid + Carbonate

A

Salt + Water + Carbon dioxide

21
Q

Acid + Metal

A

Salt + Hydrogen

22
Q

Acid + Metal hydroxide

A

Salt + Water

23
Q

Acid + Metal oxide

A

Salt + Water

24
Q

Neutralisation reaction

A

A reaction between an acid and an alkali to form salt and water

25
Q

Limewater test

A

The chemical test for carbon dioxide

26
Q

Splint/ squeaky pop test

A

The chemical test for hydrogen

Chemistry GCSE (EDEXCEL) (7 decks)

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