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Molarity

16.2a

I can calculate molarity and use it to perform stoichiometric calculations.

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1. Concentration

  1. Concentration = amount of solute dissolved per quantity of solvent

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low concentration high concentration

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??? VIDEO

Simulation:

Does the container have greater concentration before or after removing water? Explain.

Does the container have greater concentration before or after adding water? Explain.

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2. Molarity

  1. Equation p. 480
  2. M is read as “molar”

Molarity is defined as moles of solute per 1 liter of solution.

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Ex VIDEO

What is the molarity of a solution that contains 75.0 g of KNO3 dissolved in 0.350 L of solution?

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Molarity examples

  1. Calculate the molarity of a solution made by dissolving 9.8 moles of solid NaOH in enough water to make 3.62 L of solution.
  2. If you dissolve 152.5 g of CuCl2 in enough water to make a solution with a final volume of 2.25 L, what is its molarity?
  3. A solution has a volume of 375 mL and contains 42.5 g of NaCl. What is its molarity?

Video: https://youtu.be/SXf9rDnVFao