Question

Calculate the pOH if [OH-] = 1 x 10^-10.
a) 10
b) 2
c) 4
d) 6

Answer 1

The pOH is calculated by taking the negative logarithm of the hydroxide ion concentration. For [OH-] = 1 x 10^-10, the pOH equals 10, which is option (a).

Step-by-step explanation:

The question asks to calculate the pOH given that the concentration of hydroxide ions ([OH-]) is 1 x 10-10. To find the pOH, we use the formula:

pOH = -log [OH

-

]

Substitute the known concentration into the equation:

pOH = -log(1 x 10-10)

Use a scientific calculator to find the pOH:

pOH = -(-10) = 10

Therefore, the pOH of the solution is 10, which corresponds to option (a).