Question

Why is methyl orange added after phenolphthalein in carbonate titrations and not

Answer 1

Hello!

Answer :

Methyl orange is one such indicator. When titrating carbonates, which are weak acids, we typically use strong acids. ... When we use something like phenolphthalein as the end-point indicator, the color change corresponds to the first reaction. That is, it will indicate the formation of bicarbonates

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