Answer : The hydronium ion concentration in an aqueous solution is, [tex]2.138\times 10^{-3}M[/tex]
Explanation : Given,
pH = 2.670
pH : It is defined as the negative logarithm of hydronium or hydrogen ion concentration.
Formula used :
[tex]pH=-\log [H_3O^+][/tex]
Now put the value of pH in this formula, we get:
[tex]2.670=-\log [H_3O^+][/tex]
[tex][H_3O^+]=2.138\times 10^{-3}M[/tex]
Therefore, the hydronium ion concentration in an aqueous solution is, [tex]2.138\times 10^{-3}M[/tex]