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What do indicators do?
Change colour at certain pHs
What’s used in titrations and why?
Indicators that change colour quickly over a very small pH range are used so you know exactly when the reaction has ended.
What are the 2 main indicators for acid/alkali reactions?
Methyl orange and phenolphthalein
What does methyl orange turn into when adding acid to alkali?
From yellow to red
What does phenolphthalein turn into when adding acid to alkali?
Pink to colourless