The PH of a solution can be measured using the H+ ions concentration present in the solution. PH= -log(H+) H+ is the hydrogen ion concentration. or by knowing the OH- ion concentration. PH= 14- (-log(OH-)-log(OH-) is the pOH of the solution.
An avocadoâs exterior can tell a lot about whatâs happening inside. If you pay attention to the clues its color, texture, and firmness provide, you will select a perfectly ripe avocado each time. Below I describe four methods you can use to tell if an avocado is ripe. A. Skin color. An avocado with a darker skin is often riper than one with a lighter skin. 1  Scan the avocados in front of you.  The avocados with darker green-to-black skin colors may be riper than those with with lighter skins.
Avocados are a green to brown skinned fruit usually in the shape of a pear or egg. This fruit has a hard outer skin with soft flesh and a large seed inside.It usually grows between 7 cm (2.8 in) to 20 cm (7.9 in) long and can weigh up to 1kg (35 oz).ild avocados are native to Mexico where evidence suggests that they have been used for thousands of years. This wild plant was domesticated in this same area and it spread through Central and South America. Europeans first came into contact with this fruit soon after the discovery of the Americas.