Question

What is ${{K}_{a}}$ for $HCl{{O}_{4}}$?

Answer 1

pH is a measure of hydrogen ion concentration in an aqueous solution. The pH scale ranges from 0 to 14 where the values less than 7 indicates acidity while pH exactly equal to 7 is neutral and a high value of pH value indicates alkalinity.
Step by step solution: Other than pH value there are some other terms ${{K}_{a}},p{{K}_{a}},{{K}_{b}},p{{K}_{b}}$ which are also helpful to predict whether a species will donate or accept protons at a specific pH value. These terms describe the degree of ionization of an acid or base and are said to be true indicators of acid or base strength because adding water to a solution will not change the equilibrium constant values ${{K}_{a}}$ ${{K}_{a}},p{{K}_{a}}$ relate to acids while ${{K}_{b}},p{{K}_{b}}$ deal with bases.
$HCl{{O}_{4}}$ is an acid and acid are those substances which are capable of donating a proton i.e. hydrogen atom to another substance and $HCl{{O}_{4}}$ is known by the name perchloric acid which is very strong in nature and the ${{K}_{a}}$ values for strong acids are very large these are known as strong because this acid can be dissociates completely. There is no particular value of ${{K}_{a}}$for $HCl{{O}_{4}}$ but somebody estimates that the value is at around 10000000.
Hence we can say that ${{K}_{a}}$for $HCl{{O}_{4}}$is very high.

Note:
A large value of ${{K}_{a}}$ indicates that the given compound is strong acid which means that the acid is largely dissociated into its ions and it also means the formation of products in the reaction is favored whereas small value means weak acid.