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Which statement about pH is correct? A The pH of a weak base is independent of temperature - AQA - A-Level Chemistry - Question 13 - 2020 - Paper 3
Question 13
Which statement about pH is correct? A The pH of a weak base is independent of temperature. B At temperatures above 298 K, the pH of pure water is less than 7. C ... show full transcript
Worked Solution & Example Answer:Which statement about pH is correct? A The pH of a weak base is independent of temperature - AQA - A-Level Chemistry - Question 13 - 2020 - Paper 3
Step 1
B At temperatures above 298 K, the pH of pure water is less than 7.
Answer
At temperatures above 298 K, the ionization of water increases. As a result, the concentration of hydrogen ions ( ext{H}^+) increases, leading to a lower pH value compared to neutral water at 25 °C, where the pH is 7. This statement is correct.