Respuesta :
Answer: 0.10 M HCl, pH = 1
Explanation: pH or pOH is the measure of acidity or alkalinity of a solution.
pH is calculated by taking negative logarithm of hydrogen ion concentration and pOH is calculated by taking negative logarithm of hydroxide ion concentration.
[tex]pH=-\log [H^+][/tex]
[tex]pOH=-log{OH^-}[/tex]
[tex]pH+pOH=14[/tex]
1. 0.10 M [tex]HCl[/tex], pH=1
[tex]1+pOH=14[/tex]
[tex]pOH=13[/tex]
2. 0.001 M [tex]HNO_3[/tex], pH=3
[tex]3+pOH=14[/tex]
[tex]pOH=11[/tex]
3. 0.01 M [tex]NaOH[/tex], pH=12
[tex]12+pOH=14[/tex]
[tex]pOH=2[/tex]
Thus 0.10 M HCl, pH = 1 has highest pOH.
