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Questions and Answers
What is the definition of pH in terms of hydrogen ion concentration?
pH is defined as the negative logarithm to the base 10 of the hydrogen ion concentration.
What is the value of Kw, the dissociation constant of water, at 298K?
Kw = 1 x 10⁻¹⁴
What is the pH of pure water at 298K, and what are the concentrations of H₃O⁺ and OH⁻ ions?
pH = 7, [H₃O⁺] = [OH⁻] = 1 x 10⁻⁷
What is the pH range for which methyl orange acts as an indicator, and what are the corresponding acid and base colors?
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What is the formula to calculate the pH of a solution, given the pOH of that solution?
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Derive the formula for calculating the pOH of a solution, given the pH.
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Under what conditions is the pH scale not useful?
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