Question detail
A solution contains 5 g of sodium chloride (NaCl) dissolved in 250 cm³ of water. Calculate the concentration of the solution in g/dm³ (A-level cue a58990a4 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
Mathematical requirements and assessment objectives
Question
A solution contains 5 g of sodium chloride (NaCl) dissolved in 250 cm³ of water. Calculate the concentration of the solution in g/dm³ (A-level cue a58990a4 focus)
Answer
20 g/dm³. This answer is anchored to Mathematical requirements. This version is uniquely anchored to Mathematical requirements. Retrieval anchor: A-level cue a58990a4.
Explanation
20 g/dm³. This answer is anchored to Mathematical requirements. is correct because it supports the objective: Handle data, units, standard form, significant figures and uncertainty.. The reasoning stays within Mathematical requirements and avoids drifting into a similar A-Level Chemistry idea. This version is uniquely anchored to Mathematical requirements. Retrieval anchor: A-level cue a58990a4.
Common mistake
Significant Figures Confusion
Students often round numbers incorrectly when performing calculations, leading to an inaccurate number of significant figures.
To fix this, students should identify the significant figures in the original data and ensure that their final answer reflects the correct number of significant figures based on the least precise measurement.
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