Taking into account the definition of pH and pOH, the pH of the solution is 12.
<h3>Definition of pH</h3>
pH is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.
The pH is defined as the negative base 10 logarithm of the activity of hydrogen ions, that is, the concentration of hydrogen ions or H₃O⁺:
pH= - log [H⁺]= - log [H₃O⁺]
<h3>Definition of pOH</h3>
Similarly, pOH is a measure of hydroxyl ions in a solution and is expressed as the logarithm of the concentration of OH⁻ ions, with the sign changed:
pOH= - log [OH⁻]
<h3>Relationship between pH and pOH</h3>
The following relationship can be established between pH and pOH:
pOH + pH= 14
<h3>pH in this case</h3>
A solution had a hydroxide ion concentration of 1×10⁻² M. In other words [OH⁻]= 1×10⁻² M.
Replacing in the definition of pOH, it is calculated as:
pOH= - log (1×10⁻² M)
Solving;
<u><em>pOH= 2</em></u>
Replacing in the relationship established between pH and pOH, the pH can be calculated as:
pH + 2= 14
Solving:
pH= 14 - 2
<u><em>pH= 12</em></u>
In summary, the pH of the solution is 12.
Learn more about pH and pOH:
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