Question

what is ph value and ph scale​

Answer 1

Answer:

pH scale. A measure of acidity or alkalinity of water soluble substances (pH stands for 'potential of Hydrogen'). A pH value is a number from 1 to 14, with 7 as the middle (neutral) point. Values below 7 indicate acidity which increases as the number decreases, 1 being the most acidic.

Answer 2

Answer:

For example, a pH of 3 is ten times more acidic than a pH of 4, and 100 times more acidic than a pH of 5. Similarly, a pH of 9 is 10 times more alkaline than a pH of 8, and 100 more alkaline than a pH of 7. Invented in 1909 by the Danish biochemist S. P. Sørensen (1869-1939).

USAGE EXAMPLES

The PH scale balance of the lake had become heavily tilted towards the acidic because of leaching of waste products from a nearby factory.

The pH of the caustic base used in dissolving animal flesh in a tissue digesting machine is 12 on the pH scale.

We use a pH scale to check the water in our pool, to make sure it is not too alkaline or too acidic.