Final answer:
To calculate the pH of a solution with a hydronium ion concentration of 9.49×10−1 moles/liter, one would use the formula pH = -log([H3O+]). Inserting the given concentration into the formula yields the solution's pH, and because the value is less than 7, the solution is acidic.
Step-by-step explanation:
The student's question pertains to calculating the pH of a solution with a given hydronium ion concentration of 9.49×10−1 moles/liter. The pH calculation is based on the negative logarithm of the hydronium ion concentration:
pH = -log([H3O+])
Substituting the given concentration into the formula:
pH = -log(9.49×10−1)
This calculation yields a pH value which represents the acidity or basicity of the solution. As the pH value is less than 7, the solution is acidic.