Question detail

Calculate the mass of solute in grams if the concentration is 4 g/dm³ and the volume is 3 dm³.

Try the question, check the answer, then read the explanation to understand the curriculum point.

At a glance

MCQ

Type

practice

Style

Topic

Use of amount of substance in relation to masses of pure substances

Question

  1. A. 10 g
  2. B. 12 g
  3. C. 15 g
  4. D. 20 g

Answer

12 g

Explanation

The mass of solute can be calculated using the formula: mass = concentration × volume. Here, mass = 4 g/dm³ × 3 dm³ = 12 g.

Common mistake

Confusing Concentration Units

Students often confuse mass concentration (g/dm³) with amount concentration (mol/dm³) when calculating concentrations.

Always specify whether you are using mass concentration or amount concentration, and ensure you use the correct units for the calculation.

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