The value of pH which indicates the highest concentration of hydronium ions in a solution is 4, i.e. pH=4.
What is pH?
pH of any solution is define as the negative logarithm of the concentration of hydronium ions present in any solution and it is represented as:
pH = -log[H⁺]
From the definition it is clear that pH value is directly proportional to the concentration value of H⁺ ion in the solution. Higher value of pH means higher concentration so pH = 4 shows higher concentration.
Hence pH value 4 shows higher concentration.
To know more about pH, visit the below link:
https://brainly.com/question/8758541
