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Kw

Posted: Mon Jan 14, 2019 4:20 pm
by Meachelle_Lum_1I
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?)

Re: Kw

Posted: Mon Jan 14, 2019 4:26 pm
by fgalasso1b
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.

Re: Kw

Posted: Mon Jan 14, 2019 5:53 pm
by Danielle_Gallandt3I
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