Laquelle des quatre solutions de soude suivantes en...

Laquelle des quatre solutions de soude suivantes en contient-elle la plus grande quantité? A) $1000 \mathrm{~mL}$ à $2 \mathrm{~mol} \mathrm{~L}^{-1}$ C) $500 \mathrm{~mL}$ à $4 \mathrm{~mol} . \mathrm{L}^{-1}$ B) $800 \mathrm{~mL}$ à $3 \mathrm{~mol} . \mathrm{L}^{-1}$ D) $200 \mathrm{~mL}$ à $5 \mathrm{~mol} . \mathrm{L}^{-1}$

Laquelle des quatre solutions de soude suivantes en contient-elle la plus grande quantité?
A) $1000 \mathrm{~mL}$ à $2 \mathrm{~mol} \mathrm{~L}^{-1}$
C) $500 \mathrm{~mL}$ à $4 \mathrm{~mol} . \mathrm{L}^{-1}$
B) $800 \mathrm{~mL}$ à $3 \mathrm{~mol} . \mathrm{L}^{-1}$
D) $200 \mathrm{~mL}$ à $5 \mathrm{~mol} . \mathrm{L}^{-1}$

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Key Concepts

Molarity

Molarity is the concentration of a solution expressed as the number of moles of solute per liter of solution. It defines how concentrated a solution is and is a key concept when determining the amount of a substance within a given volume.

Volume

Volume refers to the amount of space that a solution occupies, typically measured in liters or milliliters. In concentration problems, knowing the volume allows you to calculate the total number of moles present in the solution when combined with molarity.

Calculation of the Amount of Substance

The amount of substance in a solution, measured in moles, is obtained by multiplying the molarity (moles per liter) by the volume (in liters). This calculation is crucial to compare different solutions to determine which one contains the greatest quantity of solute.

Unit Conversion

Unit conversion is important in these calculations as the volume provided may need to be converted from milliliters to liters. Correct unit conversion ensures that the molarity and volume are in compatible units, allowing accurate computation of the total moles.

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