What is the hydroxide ion concentration in a solution with pH = 3?

Question

Quizplus · Accepted Answer

Using the formula pH + pOH = 14, we can calculate the pOH of the solution with pH = 3 as follows:

pH + pOH = 14 
3 + pOH = 14 
pOH = 11

Next, we can use the formula pOH = -log[OH-] to calculate the hydroxide ion concentration:

11 = -log[OH-] 
[OH-] = 10^-11

Therefore, the hydroxide ion concentration in the solution is 10^-11 M, which is equivalent to 10S-11U1P0 M. However, since this answer choice is not given, the closest option is C, which has an exponent of -11 but rounded to the nearest whole number (i.e. -11 rounded to -11).

What Is the Hydroxide Ion Concentration in a Solution with PH