Equilibrium - Result Question 46

####48. Calculate the pOH of a solution at 25∘C that contains 1×10−10M of hydronium ions, i.e. H3O+.

[2007]

(a) 4.000

(b) 9.0000

(c) 1.000

(d) 7.000

Show Answer

Solution:

  1. (a) Given [H3O+]=1×10−10M at 25∘C[H3O+][OH−]=10−14

∴[OH−]=10−1410−10=10−4

Now, [OH−]=10−pOH=10−4

∴pOH=4

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