Question

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 25^o C is neutral. Adding a base will make the pH greater than 7 and that will be basic.

Answer 1

if a base is added to water it becomes a base just more translucent so it would be >7.