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Preparation of Carboxylic Acids from Hydrocarbons

0.1N solution...

Question

$0.1 N$ solution of ${N a}_{2} {C O}_{3}$ is being titrated with $0.1 N$ $H C l$ . The best indicator that can be used is:

Potassium ferricyanide

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Phenolphthalein

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Methyl red

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Litmus

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Solution

The correct option is C Methyl red
$0.1 N$ ${N a}_{2} {C O}_{3} + 0.1 N H C l \to N a H {C O}_{3} + N a C l$
half equivalence point so both phenopthalien and methyl orange can be used.

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