For the titration between hydrochloric acid and sodium carbonate, the indicator used is:
A
potassium permanganate
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B
phenolphthalein
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C
phenol red
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D
methyl orange
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Solution
The correct option is D methyl orange For the titration between hydrochloric acid and sodium carbonate, the indicator used is Methyl orange. Methyl orange indicator (pH range 3.0−4.4) is used for titrations of a strong acid with a strong or weak base. Phenolphthalein indicator (pH range 8.0−9.8) is used for titrations of a strong or weak acid with a strong base.