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.
A fully ripe nut should have a brown, even color with no gray splotches. If you chose to pick it early, the young coconut will be green and evenly colored. Regardless of its age, the nut should also have no cracks or stains, which would be a sign that the nut is damaged and its contents may have leaked out. To break open your ripe coconut and enjoy the fruit of your labor, find the eyes -- two small dots on one end of the coconut.