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pH quick check

A quick check of 3 questions. After you submit, each question shows the right answer and why.

3 of 8 questions, Advanced level. Aimed at the Advanced level, your current depth. Questions you have not answered yet come first.

Show all 8 questions

ScientistQuestion 1 of 3

A strong acid solution has [H₃O⁺] = 0.001 M. What is its pH?

AdvancedQuestion 2 of 3

Air-saturated water has [H₃O⁺] ≈ 2.0 × 10⁻⁶ M from dissolved CO₂. Calculate its pH to two decimal places.

AdvancedQuestion 3 of 3

At 80 °C, neutral pure water has a pH of 6.31. A solution at 80 °C has pH 6.5. How should it be described?