Answer: The concentration of the ion is in moles/liter.
Step-by-step explanation: The concentration of any substance is represented bu putting the symbol of that substance inside a square bracket and the concentration represents the molarity of that solution.
Concentration of
is written as
![[H^+]](https://img.qammunity.org/2017/formulas/chemistry/high-school/tus7ihg10qgbkbw5g460sfzwbs8jrjuufg.png)
Molarity : It is defined as the number of moles of solute present in one liter of solution.
Formula used :

where,
n = moles of solute
= volume of solution in L
If a solution is aqueous, it is written by writing (aq) after the chemical formula of the substance.