Statement D is the correct option as the solution will have pH of 3. It has an H3O+ ion concentration of 1 × [tex]10^{-3}[/tex] mol/L and is acidic.
Explanation:
It is given in question that solution must have pH of 3. The value if being less than 7 shows that solution is acidic. The pH value of 3 indicates that given solution is highly acidic and has strong acid. Strong acid gets fully dissociated into [tex]H_{3}[/tex][tex]O^{+}[/tex] ions.
pH of the solution is calculated as:
pH = -log10[[tex]H_{3}[/tex][tex]O^{+}[/tex]]
the concentration or molarity of the hydronium ion is given as moles/litre
concentration of hydronium ion in the solution is 1 X [tex]10^{-3}[/tex] moles/litre
putting the values in the equation:
pH = - log10( 1 X [tex]10^{-3}[/tex])
pH = 3 (acidic)
Thus it can be concluded that D option is the right answer.
