Question

The [OH⁻]of a solution with pH 8.34 is

o 2.2x 10⁻¹ M
o 3x 10⁻¹ M.
o 4.6x 10⁻¹ M.
o 5x 10⁻¹ M.
o 2.2x 10⁻¹M.

Answer 1

The hydroxide ion concentration ([OH-]) in a solution with a pH of 8.34 is calculated to be 2.2 × 10^-6 M using the pH and pOH relationship. None of the student-provided options match this calculated value.

Step-by-step explanation:

The student asks about the concentration of hydroxide ions ([OH-]) in a solution with a pH of 8.34. We can utilize the relationship pH + pOH = 14 to solve this. First, calculate the pOH:

pOH = 14 - pH = 14 - 8.34 = 5.66.

Then, find the hydroxide ion concentration by using the formula [OH-] = 10-pOH:

[OH-] = 10-5.66 = 2.2 × 10-6 M.

None of the provided options (2.2x 10-1 M, 3x 10-1 M, 4.6x 10-1 M, 5x 10-1 M, 2.2x 10-1M) match the calculated value of 2.2 × 10-6 M. Therefore, there might be a typo in the options given by the student.