A 200-mL sample and a 400-mL sample of a solution of salt...

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Key Concepts

Molarity

Molarity is a measure of concentration that indicates the number of moles of solute per liter of solution. It is a key concept in solution chemistry because it remains consistent regardless of the volume of the sample when solutions are properly mixed, meaning that two samples with the same molarity have an identical relative concentration of solute.

Volume

Volume is the quantity that measures the space a sample occupies. In the context of solutions, different volumes can contain different absolute amounts of solute, even if the concentration (molarity) remains the same. This concept helps to illustrate how sample size affects the total amount of substance present.

Moles of Solute

The number of moles of solute in a solution is directly related to both the molarity and the volume of the solution. When two samples have the same molarity but different volumes, the sample with the larger volume contains a greater total number of moles of solute, reflecting a direct proportionality between volume and the amount of solute present.

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