Question #f0437

1 Answer
Stefan V.
Apr 29, 2015

In one word: yes.

If you know the concentration of the hydroxide ions, you can determine the solution's pOH by

pOH=−log([OH−])

pOH=−log(1.9⋅10−6)=5.72

This will indirectly get you the pH of the solution

pHsol=14−pOH=14−5.72=8.28

Now use the pH to determine the concentration of the hydronium ions

[H3O+]=10−pHsol=10−8.28=5.3⋅10−9M

Alternatively, you can calculate the concentration of the hydronium ions directly by

[H3O+]=10−14[HO−]

[H3O+]=10−141.9⋅10−6=0.53⋅10−8=5.3⋅10−9M

Here's a diagram that shows how pH, pOH, [H3O+], and [OH−] relate to each other

![http://www.sciencegeek.net/Chemistry/taters/Unit8pH.htm](useruploads.socratic.org)

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