Question

How does pH relate to ${{H}^{+}}$ concentration?

Answer 1

As we know that pH is a measure of the amount of hydrogen ions present in a solution. We can calculate the value of pH by using the formula of pH that is $pH=-\log \left[ {{H}^{+}} \right]$ . And we can calculate the value of pOH by using the formula:
$pOH=-\log \left[ O{{H}^{-}} \right]$

Complete step by step answer:
- As we know that the molar concentration of hydrogen ions dissolved in a solution is basically a measure of acidity. It is found that the greater the concentration, the greater the acidity.
- It is found that the concentration can range over a large range, that is we can say from${{10}^{-1}}$ to${{10}^{-14}}$ . hence, we scale down this range in a convenient way that is the pH scale that basically means the power of hydrogen.
- As we know that we can calculate the value of pH by using the formula of pH that is $pH=-\log \left[ {{H}^{+}} \right]$ .
- We can see here an example. If we have a hydrogen that is having concentration of 0.1 M, then the pH is 1.0.
$1.0=-\log \left[ 0.1 \right]$
- Hence, we can conclude that pH relate to ${{H}^{+}}$ concentration by the equation: $pH=-\log \left[ {{H}^{+}} \right]$

Note: It is found that acids having high dissociation constant dissociates into its ions in the aqueous solution. And higher the dissociation constant, stronger is the acid, then less is its pH value. Hence, higher is the concentration of hydrogen ions. It is found that strong acids react with strong bases and undergo neutralization reactions to form water and neutral salt.