The [H₃0⁺] of the solution : 1.778 x 10⁻¹² M
Further explanation
pH is the degree of acidity of a solution that depends on the concentration of H⁺ ions. The greater the value the more acidic the solution and the smaller the pH.
pH = - log [H⁺]
So that the two quantities between pH and [H⁺] are inversely proportional because they are associated with negative values.
A solution whose value is different by n has a difference in the concentration of H⁺ ion of 10ⁿ.
pH of solution = 11.75
the [H₃0⁺] of the solution :
![\tt pH=-log[H_3O^+]\\\\11.75=-log[H_3O^+]\\\\(H_3O^+]=10^(-11.75)=1.778* 10^(-12)](https://img.qammunity.org/2021/formulas/chemistry/college/enq30jo0jhfecofkxp1uk174012fip404j.png)