Taking into account the definition of pH and pOH, the hydronium ion, H₃O⁺, and hydroxide ion, OH−, are 0.044 M and 2.29×10⁻¹³ M respectively.
First of all, 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⁺]
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⁻]
The following relationship can be established between pH and pOH:
pOH + pH= 14
In this case, you have a 0.044 M HCl.
HCl is a strong acid.
It is called strong acid, that acid that dissociates completely in solution at constant temperature and pressure. Under these conditions, the concentration of a strong acid is equal to the concentration of hydrogen ions (Hydronium or H₃O⁺). Then, in this case:
[H⁺]= [H₃O⁺]= [HCl]= 0.044 M
Replacing in the definition of pH:
pH= -log (0.044 M)
Solving:
pH= 1.36
Considering the relationship established between pH and pOH:
pOH + 1.36= 14
pOH= 14 -1.36
pOH= 12.64
Finally, replacing in the definition of pOH:
12.64= -log [OH-]
[OH-]= 10⁻¹² ⁶⁴
[OH-]= 2.29×10⁻¹³ M
In summary, the hydronium ion, H₃O⁺, and hydroxide ion, OH−, are 0.044 M and 2.29×10⁻¹³ M respectively.
Learn more:
- brainly.com/question/12200689
- brainly.com/question/16032912?referrer=searchResults
- brainly.com/question/13557815?referrer=searchResults
