Indicators in acid-based titrations

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When should Phenolphthalein be used as an indicator?
When you have a strong acid-strong base OR a weak acid- strong base
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When should methyl orange be used as an indicator?
When you have a strong acid-strong base OR a strong acid-weak base
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Colour changes of pheolphthalein
Colourless in acidic and neutral solutions / PINK in alkaline solutions
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Colour changes of methyl orange
RED in acidic solutions / ORANGE in neutral solutions / YELLOW in alkaline solutions
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Adding an alkali to an acid
Methyl orange - red to yellow Phenolphthalein - colourless to pink
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Adding an acid to an alkali
Methyl orange - yellow to red Pheonlphthalein - pink to colourless
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Other cards in this set

Card 2

Front

When you have a strong acid-strong base OR a strong acid-weak base

Back

When should methyl orange be used as an indicator?

Card 3

Front

Colourless in acidic and neutral solutions / PINK in alkaline solutions

Back

Preview of the back of card 3

Card 4

Front

RED in acidic solutions / ORANGE in neutral solutions / YELLOW in alkaline solutions

Back

Preview of the back of card 4

Card 5

Front

Methyl orange - red to yellow Phenolphthalein - colourless to pink

Back

Preview of the back of card 5
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