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.
Although many people think of red or purple when they think of plums, the yellow plum is also quite common in many areas. Typically, the yellow plum is sweet and rather high in sugar when it is ripe. It provides several different vitamins and minerals, such as vitamin A and potassium. It can be used in many different types of recipes, ranging from sorbet to preserves.