• pH of solution is the negative log of Hydrogen ion concentration in the solution
[tex]pH=-\log _{}\lbrack H^+\rbrack[/tex]• We will calculate the hydrogen concentration as follows :
[tex]\begin{gathered} pH=\text{ -}\log _{}\lbrack H^+\rbrack \\ \lbrack H^+\rbrack\text{ = }10^{-pH} \\ \text{ = 10}^{-4.5\text{ }} \\ \text{ = 3.16x10}^{-5}M \end{gathered}[/tex]This means that hydrogen concentration = 3.16x10^-5 M