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Chemistry Homework Help => YBTC chemistry for young children => Topic started by: Aditi on August 08, 2025, 02:33:23 PM

Title: Kw of water and effect of temperature .
Post by: Aditi on August 08, 2025, 02:33:23 PM
could u explain this question?
Title: Re: 14.2 Quiz - Temperature dependence of Kw
Post by: uma on August 09, 2025, 09:32:13 AM
Kw comes from the autoionization of water which is endothermic process.

Heat + 2  H₂O  ⇌  H₃O⁺  +  OH⁻

Kw is temperature-dependent because the autoionization is an endothermic process:
•    If temperature increases → equilibrium shifts right (Le Châtelier's principle) → [H3O+][H₃O⁺][H3O+] and [OH−][OH⁻][OH−] both increase → Kw increases.
•    If temperature decreases → equilibrium shifts left → [H3O+][H₃O⁺][H3O+] and [OH−][OH⁻][OH−] both decrease → Kw decreases.
Now pick up your answer.
Title: Re: Kw of water and effect of temperature .
Post by: Aditi on August 09, 2025, 10:22:12 PM
ohhh okay then it will be d