Solutions Part II: Concentration Units. Percent solutions.

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Presentation transcript:

Solutions Part II: Concentration Units

Percent solutions

Parts per million 1 mg/kg, or 1 mg/L

Parts per million 1 mg/kg, or 1 mg/L

Parts per billion 1 g/billion grams, or 1  g/L

Parts per billion 1 g/billion grams, or 1  g/L

Mole fraction Do you need the mole fraction of the SOLUTE or the SOLVENT? Be careful!

Molarity Recall from chapter 4:

Molarity, M Recall from chapter 4: Volume can change with temperature…so molarity is temperature dependent!

Molality, m

Mass doesn’t depend on temperature— so molality is independent of temperature!

Problems A solution is prepared by dissolving 34.8 g of NaCl in water and bringing the mixture to a final volume of 675 mL. Calculate the molarity.

Problem Calculate the molality of a solution prepared from 43.3 g of glucose dissolved in 832 g of water.