Now, the first thing I do is I use the formula PH plus poh equals 14. Now, if you're not certain about this formula and you don't know where this formula comes from, check out the link below. So, I simply take our PH, plug it in into this number, and we get 14 equals 3.5 plus poh subtract by 3.5
and I get poh is equal to 10.5. And now I simply apply the formula for poh. So, Poh is equal to 10.5,
which is equal to negative log of the concentration of oh. Now, I convert this log to exponents.