Hello!
The H₃O⁺ concentration can be found using the definition of pH and clearing the equation for [H₃O⁺]. The solution has a pH lower than 7, so the Sauvignon Blanc is acid. The calculation for [H₃O⁺] is shown below:
[tex]pH=-log [H_3O^{+}] [/tex]
[tex][H_3O^{+}]= 10^{-pH}=10^{-3,24}=0,00058M [/tex]
So, the concentration of H₃O⁺ in a Sauvignon Blanc with a pH of 3,24 is 0,00058 M
Have a nice day!
