Question

What is the [OH ] in a solution that has a [H₃0+]= 2.5 x 10-3M?

a. O 1.0 x 10-12 M
b. O 4.0 x 10-11M
c. O 4.0x 10-12 M
d. O 2.5 x 10-12 M

Answer 1

The concentration of hydroxide ions ([OH-]) can be calculated using the equation [H3O+] x [OH-] = 1.0 x 10-14. In this case, the given [H3O+] is 2.5 x 10-3 M, so [OH-] = 4.0 x 10-12 M.

Step-by-step explanation:

The concentration of hydroxide ions ([OH-]) can be calculated using the equation [H3O+] x [OH-] = 1.0 x 10-14. In this case, the given [H3O+] is 2.5 x 10-3 M, so we can rearrange the equation to solve for [OH-]. Dividing both sides of the equation by [H3O+], we find that [OH-] = 1.0 x 10-14 / (2.5 x 10-3), which equals 4.0 x 10-12 M. Therefore, the correct answer is option C: O 4.0 x 10-12 M.