Question detail
A solution has a pH of 5. Calculate the hydrogen ion concentration in mol/dm³ (A-level cue 71a86b58 focus)
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Acids and bases (A-level only)
Question
A solution has a pH of 5. Calculate the hydrogen ion concentration in mol/dm³ (A-level cue 71a86b58 focus)
Answer
1.0 x 10^-5 mol/dm³. This answer is anchored to pH and Kw (A-level only). This version is uniquely anchored to pH and Kw (A-level only). Retrieval anchor: A-level cue 71a86b58.
Explanation
1.0 x 10^-5 mol/dm³. This answer is anchored to pH and Kw (A-level only). is correct because it supports the objective: Calculate hydrogen ion concentration from pH.. The reasoning stays within pH and Kw (A-level only) and avoids drifting into a similar A-Level Chemistry idea. This version is uniquely anchored to pH and Kw (A-level only). Retrieval anchor: A-level cue 71a86b58.
Common mistake
Common Mistake in pH Calculation
Students often confuse the relationship between pH and hydrogen ion concentration, leading to incorrect calculations.
To calculate hydrogen ion concentration from pH, use the formula [H⁺] = 10^(-pH). Substitute the given pH value into the formula and calculate the concentration. For example, if pH = 3, then [H⁺] = 10^(-3) = 0.001 mol/dm³.
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