Concentration

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$Unit 2- Measurements, Math, and the Mole$

Molarity (M) • Most commonly used in acid/base chemistry M MolesofSolute LitersofSolution • Example: Calculate the molarity of 20.0 grams of NaOH in 100.0 grams of H2O. • Given: 20.0 g NaOH 100.0 g H2O • Solve: 1. Convert grams NaOH to moles NaOH 1molNaOH 20.0gNaOH 0. 500molNaOH 40gNaOH 2. Convert grams H2O to Liter H2O 1mL 1L 100.0gH2O 0. 1000 L 1gH O 1000 mL 3. Divide moles NaOH by Liters H2O 0.500 molNaOH M 5. 00M 0.1000 L • Answer: 5.00 M 2
Grams per Liter (g/L) • Most commonly used to express solubility GramsperLiter GramsofSolute LitersofSolution • Example: Calculate the grams per liter of 20.0 grams of NaOH in 100.0 mL of H2O. • Given: 20.0 g NaOH 100.0 g H2O • Solve: 1. Convert mL H2O to Liters H2O 1L 100.0mL 0. 1000 L 1000 mL 2. Divide grams NaOH by Liters H2O 20.0gNaOH GramsperLi ter 200. g / L 0.1000 L • Answer: 200. g/L
Page 1 and 2: 8-4. Know how to calculate the conc
Page 3: Calculating the Concentration of a
Page 7 and 8: Parts per Million (ppm) • Used to

Concentration

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