Chemistry - Ionic Equilibrium Question with Solution | TestHub

ChemistryIonic EquilibriumMiscellaneous/MixedEasy2 minPYQ_2020

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At $25^{o} C, p H$ range of phenolphthalein is $8 - 10 .$ At $100^{o} C,$ $pH$ range of phenolphthalein would be -

Answer:

Solution:

The $pH$ range of the indicator is $p K_{I n} \pm 1 .$ On increase in temperature $p K_{I n}$ decreases therefore $pH$ range of indicator decreases.

Stream:NTA_ABHYASSubject:ChemistryTopic:Ionic EquilibriumSubtopic:Miscellaneous/Mixed

⏱ 2mℹ️ Source: PYQ_2020

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