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Section 7 -2

Section 7 -2 . Concentration and Solubility. Concentration. A comparison between the amount of solvent compared to the solute. Solubility. A measure of how much solute can dissolve in a solvent S ugar is more soluble in water than salt, thus you can dissolve more sugar in water than salt

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Section 7 -2

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  1. Section 7 -2 Concentration and Solubility

  2. Concentration • A comparison between the amount of solvent compared to the solute

  3. Solubility • A measure of how much solute can dissolve in a solvent • Sugar is more soluble in water than salt, thus you can dissolve more sugar in water than salt • Unsaturated solution • More solute can still dissolve in the solvent • Saturated solution • No more solute can dissolve in the solvent

  4. Factors Affecting Solubility • Pressure • Increasing pressure increases the solubility of gases • Example: The carbon dioxide (solute) in soda will stay dissolved in water (solvent) under pressure. • Type of solvents • “Like dissolves like” • Water will clean up, or dissolve, poster paint (polar), but it takes turpentine (non-polar) to clean up oil based paint.

  5. Temperature • Solids • The higher the temperature the more solute can dissolve in a solvent • Example: you can dissolve more sugar in hot tea than you can in cold tea. • Gases • The lower the temperature the more solute can dissolve in a solvent • Example: warm soda will lose it’s carbonation faster than cold soda.

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