Question detail
A solution contains 10 g of sodium chloride (NaCl) dissolved in 0.5 dm³ of water. Calculate the concentration of the solution in g/dm³.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Use of amount of substance in relation to masses of pure substances
Question
A solution contains 10 g of sodium chloride (NaCl) dissolved in 0.5 dm³ of water. Calculate the concentration of the solution in g/dm³.
Answer
20 g/dm³
Explanation
The concentration is calculated by dividing the mass of the solute by the volume of the solution. This question tests the ability to apply the concentration formula in a practical context.
Common mistake
Confusing Concentration Units
Students often confuse grams per cubic decimetre (g/dm³) with moles per cubic decimetre (mol/dm³) when calculating concentrations.
Always check the units required for the concentration calculation and ensure you are using mass (g) and volume (dm³) for g/dm³.
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