Concentration in g/dm3 and mol/dm3 Flashcards

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What is meant by the concentration of a solution?

Concentration is how much solute is dissolved in a certain volume of solution.

What does the unit g/dm3 mean?

g/dm3 means the number of grams of solute dissolved in 1 dm3 (1 litre) of solution.

What does the unit mol/dm3 mean?

mol/dm3 means the number of moles of solute dissolved in 1 dm3 of solution.

How many cubic centimetres (cm3) are there in 1 dm3?

There are 1000 cm3 in 1 dm3.

State the formula for concentration in g/dm3 using mass and volume.

Concentration (g/dm3) = mass of solute (g) ÷ volume of solution (dm3).

A solution contains 5.0 g of a solid in 0.25 dm3 of solution. What is its concentration in g/dm3?

Concentration = 5.0 g ÷ 0.25 dm3 = 20 g/dm3.

State the formula for concentration in mol/dm3 using moles and volume.

Concentration (mol/dm3) = moles of solute (mol) ÷ volume of solution (dm3).

How do you find the number of moles in a solution if you know its concentration in mol/dm3 and its volume in dm3?

Moles of solute (mol) = concentration (mol/dm3) × volume (dm3).

How do you convert a concentration from g/dm3 to mol/dm3?

Divide the concentration in g/dm3 by the relative formula mass (Mr) of the solute.

How do you convert a concentration from mol/dm3 to g/dm3?

Multiply the concentration in mol/dm3 by the relative formula mass (Mr) of the solute.

What is the difference between a concentrated solution and a dilute solution?

A concentrated solution has a high concentration (more solute per dm3), while a dilute solution has a low concentration (less solute per dm3).