Answer:
Assuming that the lemon juice is the only source of H3O+ ions in the water, we can use the formula for pH to calculate the pH of the water-lemon mixture:
pH = -log[H3O+]
First, we need to determine the concentration of H3O+ in the solution. We are given that the concentration of H3O+ after the lemon is squeezed into the water is 0.00006 M. Therefore:
[H3O+] = 0.00006 M
Now, we can substitute this value into the pH formula:
pH = -log(0.00006)
pH = 4.22
Therefore, the pH of the water-lemon mixture is 4.22.