More precisely it is the negative of the logarithm to base 10 of the activity of the hydrogen ion.[1] Solutions with a pH less than 7 are acidic and solutions with a pH greater than 7 are basic. Pure water is neutral, at pH 7, being neither an acid nor a base.
Report Abuse. 1  Ripe Plum. 2  This Site Might Help You. 3  A plum is ripe when its soft and a really dark purpleish color.  they should be a little soft and should have a smell (plum smell) strawberry Â· 9 years 1  ago. Smell it, squish it and last but not least bite 2  it! plump(really soft) and dark all 3  over. the color tells u everything u need to  know.
Answer Wiki. The most effective to tell if fresh figs are ripe is to note how they hang from the tree. Ripe and ready-to-pick figs hang down, almost as if they're ready to drop from their weight (droopy), have dewy skin from the nectar and will possibly have small tears in the skin, and are soft to the touch (think peaches).