pH of water is 7 at 2 5 ∘ C . If water is heated to 8 0 ∘ C ., it's pH will :

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ChemistryIonic EquilibriumGeneral (Ostwald's Dilution Law, Degree of Ionisation)Medium2 minPYQ_2025

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pH of water is 7 at $2 5^{\circ} C$ . If water is heated to $8 0^{\circ} C$ ., it's pH will :

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Solution:

At $2 5^{\circ} C$ , pure water has $pH = 7$
As temperature increased, water molecules dissociate more into hydrogen ions ( $H^{+}$ ) and hydroxide ions $(OH^{-})$ .
This increased dissociation leads to slightly decrease in pH .
At $8 0^{\circ} C, pH \approx 6.93$

Stream:JEESubject:ChemistryTopic:Ionic EquilibriumSubtopic:General (Ostwald's Dilution Law, Degree of Ionisation)

⏱ 2mℹ️ Source: PYQ_2025

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