Question

Which Salt has Highest pH in water \[?\]

Answer 1

Hint :First we know pH stands for Hydrogen potentials. It refers to the concentration of the hydrogen ions in a solution. This is the indicator of a solution’s acidity or alkalinity. A pH scale is a tool for measuring strength of acids and bases. The strength of acids and bases depends on the number of \[{H^ + }\] and \[O{H^ - }\] ions produced. Also, the pH value on a pH-scale varies from \[0\] to \[14\].

Complete Step By Step Answer:
Litmus paper is an indicator used to tell if a substance is an acid or a base. The colour of the paper matches up with the numbers on the pH scale to indicate what kind of substance is being tested.
Solutions having a value of pH ranging \[0\] to \[7\] on pH scale are termed as acidic and for the value of pH ranging \[7\] to \[14\] on pH scale are known as basic solutions.
Solutions having the value of pH equal to \[7\] on pH-scale are known as neutral solutions. Solutions with the value of pH equal to \[14\] are termed as strongly basic solutions. Further, solutions having the value of pH equal to \[0\] are known to be strongly acidic solutions.
The salt that releases \[O{H^ - }\] ions when it undergoes hydrolysis (dissolves in water) will give the highest pH in water. Only the salt of a strong base and weak acid would release \[O{H^ - }\]ions on hydrolysis.

Note :
Mathematically, the pH value equals the negative logarithmic value of the concentration of hydrogen ion (\[{H^ + }\])
i.e., \[pH = - \log [{H^ + }]\]
Also note that all the acids and bases do not react with the same chemical compound at the same rate. Some react very vigorously, some moderately while others show no reaction.