Multiple Choice
A NaOH solution contains 1.90 mol of NaOH and has a concentration of 0.555 M. What is the volume of the solution in liters?
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6. Chemical Quantities & Aqueous Reactions
Molarity
Multiple Choice
In general chemistry, what does molarity measure?
A
The number of moles of solute per kilogram of solvent
B
The number of moles of solute per liter of solution
C
The volume of solute per volume of solution
D
The number of grams of solute per liter of solution
Verified step by step guidance1
Understand that molarity is a concentration unit used in chemistry to express the amount of solute dissolved in a given volume of solution.
Recall the definition of molarity, which is the number of moles of solute divided by the volume of the entire solution in liters.
Write the formula for molarity as \(M = \frac{\text{moles of solute}}{\text{liters of solution}}\).
Note that molarity depends on the total volume of the solution, not just the solvent, and it uses moles (a measure of amount of substance) rather than mass or volume of solute alone.
Compare molarity to other concentration units, such as molality (moles of solute per kilogram of solvent), to clarify that molarity specifically involves volume of solution.
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