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Postby Meachelle_Lum_1I » Mon Jan 14, 2019 4:20 pm

For water at temperatures higher than 25 degrees Celsius, we will have a different K value which changes the pH/pOH values. Does this mean that the pH for neutral water isn’t always 7? (So a pH of 7 doesn’t exactly mean neutral?)

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Re: Kw

Postby fgalasso1b » Mon Jan 14, 2019 4:26 pm

a pH of 7 is neutral. Water at room temperature (25C) has a pH of 7, however depending on the temperature change, the pH can slightly increase or decrease. For example, when you boil water the pH slightly decreases (more acidic) due to the increase of ionization.

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Re: Kw

Postby Danielle_Gallandt3I » Mon Jan 14, 2019 5:53 pm

Dr. Lavelle did mention however that the pH does not change very significantly so a small change in temperature will mean the water is basically still at a pH of 7

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