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Universal Indicator

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Question

What is the indicator used for the titration between oxalic acid and sodium hydroxide ? Justify your answer with suitable reason.

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Solution

Oxalic acid is a weak organic acid and sodium hydroxide is a strong base.
For the titration between oxalic acid and sodium hydroxide, phenolphthalein is used as an indicator as it changes the colour in a pH range of titration $(8.3 - 10.0)$ .

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