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Sagot :
The concentration of hydroxide ion of a solution with a pH of 8. 25 is 1.77×[tex]10^{6}[/tex] M
Calculation,
The pH of a solution tells us about concentration of the [tex]H^{+[/tex] ion ( proton ) in solution. However, if we know the value of pH , we can calculate pOH with the help of pH and from pOH we can find concentration of hydroxide ions in the solution.
pH + pOH = 14
8. 25 + pOH = 14
pOH = 14 - 8. 25 = 5.75
Since, pH = -㏒[ [tex]H^{+[/tex] ]
Similarly, pOH = -㏒[[tex]OH^{-[/tex] ]
If pOH = 5.75 , that means that -㏒[[tex]OH^{-[/tex] ] = 5.75 ,which means that,
[[tex]OH^{-[/tex] ] = [tex]10^{-5.75}[/tex] = 1.77×[tex]10^{6}[/tex].
So, we know that the concentration of the [tex]OH^{-[/tex] ions in the solution with pH of 8.25 is 1.77×[tex]10^{6}[/tex] Molar
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