Multiple Choice QuestionA solution has a hydroxide-ion concentration of 5.7 × 10–3M. Which are the pOH and pH of the solution?Multiple choice question.pOH = 11.76 and pH = 2.24pOH = 2.24 and pH = 11.76pOH = 3.00 and pH = 11.00pOH = 5.70 and pH = 8.30
Question
Multiple Choice QuestionA solution has a hydroxide-ion concentration of 5.7 × 10–3M. Which are the pOH and pH of the solution?Multiple choice question.pOH = 11.76 and pH = 2.24pOH = 2.24 and pH = 11.76pOH = 3.00 and pH = 11.00pOH = 5.70 and pH = 8.30
Solution
To solve this problem, we first need to calculate the pOH of the solution. The pOH is calculated as the negative logarithm (base 10) of the hydroxide ion concentration.
Given that the hydroxide-ion concentration is 5.7 × 10–3 M, the pOH is calculated as follows:
pOH = -log10(5.7 × 10–3) = 2.24
Next, we calculate the pH of the solution. The pH and pOH of a solution at 25 degrees Celsius are related by the equation:
pH + pOH = 14
So, to find the pH, we subtract the pOH from 14:
pH = 14 - pOH = 14 - 2.24 = 11.76
Therefore, the pOH of the solution is 2.24 and the pH is 11.76. The correct answer is "pOH = 2.24 and pH = 11.76".
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