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What is the pH of a solution with a hydroxide ion concentration of 0.001 M?

Practice Questions

Q1
What is the pH of a solution with a hydroxide ion concentration of 0.001 M?
  1. 11
  2. 12
  3. 13
  4. 14

Questions & Step-by-Step Solutions

What is the pH of a solution with a hydroxide ion concentration of 0.001 M?
  • Step 1: Identify the concentration of hydroxide ions (OH-) in the solution, which is given as 0.001 M.
  • Step 2: Use the formula for pOH, which is pOH = -log[OH-].
  • Step 3: Substitute the value of [OH-] into the formula: pOH = -log(0.001).
  • Step 4: Calculate the logarithm: -log(0.001) equals 3, so pOH = 3.
  • Step 5: Use the relationship between pH and pOH, which is pH + pOH = 14.
  • Step 6: Substitute the value of pOH into the equation: pH = 14 - pOH = 14 - 3.
  • Step 7: Calculate the final pH: pH = 11.
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