Question detail
In a reaction, 5 g of sodium chloride (NaCl) is dissolved in water to make a solution. Calculate the concentration of the solution in g/dm³. (Mr of NaCl = 58.5)
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
In a reaction, 5 g of sodium chloride (NaCl) is dissolved in water to make a solution. Calculate the concentration of the solution in g/dm³. (Mr of NaCl = 58.5)
Answer
The concentration of the solution is 85.7 g/dm³.
Explanation
This question assesses the ability to calculate concentration from mass and volume. It requires understanding of the relationship between mass of solute and the volume of solution.
Common mistake
Confusing Ratios
Students often confuse mole ratios with mass ratios when balancing equations, leading to incorrect calculations.
To avoid this mistake, always identify whether you are working with moles or masses and use the correct ratios from the balanced equation.
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