the ph scale

The pH Scale - The strength of acids and bases can be expressed in terms of the concentration of the hydronium ions or hydroxyl ions in a solution. The concentration of hydronium ions in a solution can be expressed as moles of hydronium ions per litre of solution. This is expres..

It is quite clear that the strength of acids and bases can be expressed in terms of the concentration of hydrogen ions, i.e., hydronium ions (H 3 O + ) or hydroxyl ions (OH - ) in a solution. The concentration of hydronium ions in a solution can be expressed as moles of hydronium ions per litre o..

Arrehenius' Concept of Acids and Bases An acid is a substance which can furnish hydrogen ions in its solution. Examples: ..

We have seen that concept of ionic product of water enables us to classify solutions as acidic, basic or neutral by specifying H 3 O + ion concentration. The pH scale was devised by P.L Sorensen (1909) is defined as negative logarithm of hydronium ion concentration in moles pe..

Celsius scale of temperature was devised by a Swedish astronomer Anders Celsius (1701-1744). In this scale, the lower fixed point (the temperature of melting ice at normal atmospheric pressure) is taken as zero degree Celsius, written as 0 0 C. The upper fixed point (the tempera..

>For neutral solution pH = 7 A scale called as the pH scale is devised to express the acidic and basic properties of solution in terms of the pH valu..

..

Study of Acids Bases and Salts..

The meter scale enables us to measure the length to the nearest millimeter only. Engineers and scientists need to measure much smaller distances accurately. For this a special type of scale called Vernier scale is used. Vernier Calliper The Vernier scale cons..

It is an improved version of the simple mercury barometer. It gives more accurate reading of the atmospheric pressure because a vernier scale is used her..