Answer:
E
Explanation:
Lets do this step by step
First, lets find the pOH
pOH=-log[OH] ----> pOH=-log[1x10^-12] ----->pOH=12
Now we can find the pH
14-12=2
Now we can use the pH=-log[H3O] to find the hydrogen ion concentration
2=-log[H3O] ------>[H3O]=1.0 x 10^-2
So the answer is E
Taking into account the definition of pH and pOH, you get that the [H₃O⁺] in the solution is 10⁻² M.
First, you must calculate the pOH of the solution. The pOH (or potential OH) is a measure of the basicity or alkalinity of a solution. It is a measure that indicates the amount of OH- hydroxide ions present in a solution or substance.
Mathematically, pOH is defined as the negative logarithm of the activity of hydroxide ions (that is, the concentration of OH- ions):
pOH= - log [OH⁻]
In this case, being [OH⁻]= 1×10⁻¹² M and replacing in the definition of pOH:
pOH= -log (1×10⁻¹² M)
pOH= 12
Now, similarly, pH is a measure of the acidity or basicity of a solution that is defined as the negative logarithm to base 10 of the activity of hydrogen ions or H₃O⁺.
pH= - log [H⁺]= -log [H₃O⁺]
The relationship between pH and pOH is established by the expression:
pH + pOH= 14
Being pOH= 12, you can obtain the pH by:
pH + 12= 14
pH= 14 - 12
pH= 2
Replacing this value in the definition of pH:
2 = -log [H₃O⁺]
and solving:
[H₃O⁺]= 10⁻² M
In summary, the [H₃O⁺] in the solution is 10⁻² M.
Learn more about pH and pOH with this example: brainly.com/question/13423425?referrer=searchResults
