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Properties of Acid and Alkali (Part 2)
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Phenolphtalein as the indicator
Acid and neutral are colourless, alkali pink
Methyl orange as the indicator
Acid red, neutral and alkali yellow
pH scale
To show the strength of acids or alkalis
The lower the pH value
The more acidic the substance
The range of pH value
Between 0 to 14
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Properties of Acid and Alkali (Part 2)
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