Use an indicator, e.g. universal indicator.
Its hydrogen ion concentration determines whether a solution is to be acidic (pH below 7) or basic (pH higher than 7.0) . Acidic: [H+] > [OH-] , or pH < 7.0 in water at 25 oC Basic : [H+] <...
look at the pH level. If the pH is from 0 to 7, it is acidic. If it is exactly 7, that means it is water and it is neutral. 7 to 14 is basic.
It would be basic.
it depends on what solution
Neutral