What is the pH of a solution with a hydroxide ion concentration of 1.0 x 10^-4 M

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Question: What is the pH of a solution with a hydroxide ion concentration of 1.0 x 10^-4 M?

Options:

Correct Answer: 10

Solution:

To find the pH, first calculate pOH = -log[OH-] = 4, then use pH + pOH = 14, so pH = 14 - 4 = 10.

What is the pH of a solution with a hydroxide ion concentration of 1.0 x 10^-4 M?

What is the pH of a solution with a hydroxide ion concentration of 1.0 x 10^-4 M?

Step 1: Identify the hydroxide ion concentration given in the problem, which is 1.0 x 10^-4 M.
Step 2: Use the formula to calculate pOH, which is pOH = -log[OH-]. Substitute the value: pOH = -log(1.0 x 10^-4).
Step 3: Calculate the logarithm: pOH = 4.
Step 4: Use the relationship between pH and pOH, which is pH + pOH = 14.
Step 5: Rearrange the equation to find pH: pH = 14 - pOH.
Step 6: Substitute the value of pOH: pH = 14 - 4.
Step 7: Calculate the final pH: pH = 10.

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