Why the pH value does not change?

Johnny Leong

When the CuO (copper oxide) is put into water, it does not dissolve in water. But why the pH value of the water does not change?

Zargawee

pH of a solution is measured by H₃O⁺ concentration , therefore , the value of the water won't change cause no H₃O⁺ were added or taken .

Monique

pH might change due to a redox reaction, catalyzed by the metal, but you say it doesn't dissolve, so no reaction is taking place (with dissolve I mean ions coming free).

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Johnny Leong	Why the pH value does not change? Tweet When the CuO (copper oxide) is put into water, it does not dissolve in water. But why the pH value of the water does not change?

Zargawee	pH of a solution is measured by H₃O⁺ concentration , therefore , the value of the water won't change cause no H₃O⁺ were added or taken .

Monique Recognitions: Gold Member Science Advisor Staff Emeritus	pH might change due to a redox reaction, catalyzed by the metal, but you say it doesn't dissolve, so no reaction is taking place (with dissolve I mean ions coming free).