Question

Find the POH of a solution of H3PO4 having a concentration of 0.05M​

Answer 1

The pOH of the solution is 13.176

Step-by-step explanation:

The concentration of
`H_(3)PO_(4)` solution is 0.05 M

`H_(3)PO_(4)` produces
`3\:H^(+)\:ions\:`.

`H_(3)PO_(4)\longrightarrow3H^(+)+PO_(4)^(3-)`

If the concentration of
`H_(3)PO_(4)` is 0.05 M, then the concentration of
`H^(+)\:ions\:` is three times that of
`H_(3)PO_(4)`.

`[H^(+)]=3*0.05=0.15M`

pH =-㏒(
`[H^(+)]`)= -㏒(0.15) =0.824

pOH = 14 - pH = 13.176