Explanation:
It is known that,
Molar mass of Cd = 112.41 g/mol
Standard concentration of Cd = 0.005 mg/L = g/L
Hence, we will calculate the molarity as follows.
Molarity =
= M
Equation for the reaction is as follows.
M
Also,
=
=
Relation between pH and concentration of hydrogen ions is as follows.
pH =
=
= 10.82
Thus, we can conclude that a minimum pH of 10.82 is necessary to reduce the dissolved cadmium ion concentration to the standard.