Final answer:
The concentration of hydronium ions in a soda with a pH level of 2.3 is 5.01 × 10⁻³ M, calculated by the antilog of the negative pH value.
Step-by-step explanation:
To calculate the hydronium ion concentration from a given pH level, you need to understand the relationship between pH and hydronium ion concentration. The pH is defined as the negative logarithm (to base 10) of the hydronium ion concentration ([H₃O+]). Therefore, to find the hydronium ion concentration when you know the pH, you need to take the antilog (also known as the inverse logarithm) of the negative pH value.
If a soda has a pH level of 2.3, you can calculate the hydronium ion concentration by reversing the pH equation: [H₃O+] = 10-pH. So the calculation would be [H₃O+] = 10-2.3. Using a scientific calculator, you'd find that [H₃O+] = 5.01 × 10⁻³ M, which represents the concentration of hydronium ions in the soda.