November 26, 2015

Homework Help: pH scale

Posted by Jacob on Wednesday, January 17, 2007 at 3:43pm.

If a base is added to water, the pH will

increase, decrease, stay the same, or increase sometimes and decrease sometimes.

I have asked several friends and the two answers I get is increase from 3 of them and stay the same from 2 of them. I am confused.

And so are your friends, at least half of them, anyway. :-)).

pH is a scale for acidity (or basicity).
It runs from 0 to 14 for most solutions.
7 is neutral.
<7 is acid.
>7 is basic.
Pure water at 25o C is neutral. Adding a base will make the pH greater than 7 and that will be basic.

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