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  3. Chemistry
  4. The pH of pure water at 90 °C will be

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Q. The $ pH $ of pure water at $ 90\,{}^°C $ will be

J & K CETJ & K CET 2019Equilibrium

Solution:

At $298\, K$, $pH$ of water is $7$. At higher temperature, $H_{2}O$ dissociates more to give larger concentration of $H^{+}$ ions. $pH$ will be less than $7$