16.2 Concentrations of Solutions Summary
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SECTION SUMMARY
16.2 Concentrations of Solutions Summary:
The relative amounts of solute and solvent in a solution can be described qualitatively as dilute or concentrated. Quantitative units of concentration include molar concentration, percent by volume, and percent by mass. Molarity (M), the most important unit of concentration in chemistry; is expressed as moles of solute per liters of solution. Solutions of different concentrations can be prepared by diluting a stock solution. In dilution, the moles of solute remain the same, while the amount of solvent changes. For example, one hundred mL of 1.0M-sodiuum hydroxide is less concentrated than 1.0 L of 5M of sodium hydroxide solution.
16.2 Concentrations of Solutions Vocabulary Terms: concentration: a measurement of the amount of solute that is dissolved in a given quantity of solvent; usually expressed as mol/L dilute solution: a solution that contains a small amount of solute concentrated solution: a solution containing a large amount of solute molarity (M): the concentration of solute in a solution expressed as the number of moles of solute dissolved in 1 liter of solution percent solution: concentration expressed as volume of solute over volume of solution x 100%
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