Calculate the pH of a solution that has a hydroxide ion concentration, [OH−] , of 8.30×10−5 M.

Answer 1

The question is asking us to calculate the pH of a solution given an OH- concentration. We must first understand what the relationship between pH, pOH, and [OH-].

1. pOH = -log[OH-]
2. 14= pH + pOH

The question gives us [OH-] = 8.30*10^-5 M. So let us solve for pOH using equation 1.

pOH= -log (8.30*10^-5 M) = 4.08

Using equation 2, we can solve for pH using the pOH value we solved.

Rearrange the equation to pH= 14-pOH

pH= 14-4.08

pH = 9.92

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