Common titration indicators and facts about them Flashcards

1
Q

Methyl orange - colour in acid

A

Red

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2
Q

Methyl orange - colour in alkali

A

Yellow

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3
Q

Methyl orange - neutralisation colour

A

Orange

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4
Q

Methyl orange - pH at end point

A

4.3

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5
Q

Phenolphthalein - colour in acid

A

Colourless

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6
Q

Phenolphthalein - colour in alkali

A

Pink

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7
Q

Phenolphthalein - neutralisation colour

A

Faint pink

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8
Q

Phenolphthalein - pH at end point

A

9.1

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9
Q

Bromocresol green - colour in acid

A

Yellow

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10
Q

Bromocresol green - colour in alkali

A

Blue

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11
Q

Bromocresol green - neutralisation colour

A

Green

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12
Q

Bromocresol green - pH at end point

A

4.6

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13
Q

Congo red - colour in acid

A

Blue

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14
Q

Congo red - colour in alkali

A

Red

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15
Q

Congo red - neutralisation colour

A

Purple

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16
Q

Congo red - pH at end point

A

4.0

17
Q

Thymolphthalein - colour in acid

A

Colourless

18
Q

Thymolphthalein - colour in alkali

A

Blue

19
Q

Thymolphthalein - neutralisation colour

A

Faint blue

20
Q

Thymolphthalein - pH at end point

A

10.0