What is the pH of a solution that has a hydronium ion concentration of 1 x 10^-5

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Question: What is the pH of a solution that has a hydronium ion concentration of 1 x 10^-5 M?

Options:

Correct Answer: 5

Solution:

pH is calculated as pH = -log[H3O+]. For [H3O+] = 1 x 10^-5 M, pH = -log(1 x 10^-5) = 5.

What is the pH of a solution that has a hydronium ion concentration of 1 x 10^-5 M?

What is the pH of a solution that has a hydronium ion concentration of 1 x 10^-5 M?

Step 1: Understand that pH is a measure of how acidic or basic a solution is.
Step 2: Know that pH is calculated using the formula pH = -log[H3O+].
Step 3: Identify the hydronium ion concentration given in the question, which is [H3O+] = 1 x 10^-5 M.
Step 4: Substitute the value of [H3O+] into the pH formula: pH = -log(1 x 10^-5).
Step 5: Calculate the logarithm: log(1 x 10^-5) = -5.
Step 6: Apply the negative sign: pH = -(-5) = 5.
Step 7: Conclude that the pH of the solution is 5.

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