Final answer:
The OH- concentration of a solution with a pH of 1.89 is 10^(-12.11) M.
Step-by-step explanation:
The pH of a solution can be used to find the OH- concentration. The pOH is the negative logarithm of the hydroxide-ion concentration. By subtracting the pH value from 14, you can calculate the pOH. In this case, since the pH is 1.89, the pOH would be 14 - 1.89 = 12.11. To find the OH- concentration, you can take the antilogarithm of the pOH value: [OH-] = 10^(-pOH). Therefore, the OH- concentration of the solution with a pH of 1.89 would be 10^(-12.11) M.