Question detail

What is the concentration in g/dm³ of a solution containing 10 grams of solute in 2 dm³ of solution?

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

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At a glance

MCQ

Type

practice

Style

Topic

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

Question

A. 5 g/dm³
B. 20 g/dm³
C. 10 g/dm³
D. 15 g/dm³

Answer

5 g/dm³

Explanation

Using the formula concentration = mass / volume, we find concentration = 10 g / 2 dm³ = 5 g/dm³.

Common mistake

Misunderstanding Mole Ratios

Students often confuse the coefficients in a balanced equation as mass ratios instead of mole ratios.

Emphasize that coefficients represent the number of moles of each substance, not their masses. Practice interpreting balanced equations to reinforce this concept.

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