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:
![pH=-log [H_3O^(+)]](https://img.qammunity.org/2019/formulas/chemistry/high-school/j5u8k09z6yo2hc5tojwyn8bozi8au2vj9l.png)
![[H_3O^(+)]= 10^(-pH)=10^(-3,24)=0,00058M](https://img.qammunity.org/2019/formulas/chemistry/high-school/272jnefvqtxm6903c53rbqyk0lb4l2093n.png)
So, the concentration of H₃O⁺ in a Sauvignon Blanc with a pH of 3,24 is
0,00058 MHave a nice day!