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1 Learning Check If we dissolve 40.55g of FeCl 3 in enough water to make 500. mL of the solution, what is the molarity of the solution? Convert all unit:

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Presentation on theme: "1 Learning Check If we dissolve 40.55g of FeCl 3 in enough water to make 500. mL of the solution, what is the molarity of the solution? Convert all unit:"— Presentation transcript:

1 1 Learning Check If we dissolve 40.55g of FeCl 3 in enough water to make 500. mL of the solution, what is the molarity of the solution? Convert all unit: 40.55 g FeCl 3 1 mol FeCl 3 = 0.2500 mol FeCl 3 162.20 g FeCl 3 500. mL1 L =0.500 L 1000 mL Plug in to Molarity equation: Molarity = 0.2500 mol 0.500 L Molarity = 0.500 M solution

2 2 Preparing Solutions Weigh out a solid solute and dissolve in a quantity of solvent to make desired amount of solution.

3 3 If a 6.0 L solution of 2.0 M HCl is diluted with 3.0 L of water, what is the new molarity? DilutionsDilutions M 1 V 1 = M 2 V 2 (6.0 L)(2.0 M) = (9.0 L)(M 2 ) 12.0 mol / 9.0 L = M 2 1.3 M

4 4 What volume must be added to a 60.0 L solution of 3.00 M NaOH to produce a 1.50 M sample? Learning Check M 1 V 1 = M 2 V 2 (60.0 L)(3.00 M) = (1.50 M)(V 2 ) V 2 = 120. L Volume to be added = 120. L – 60.0 L = 60.0 L

5 5 What is Nickel (II) Chloride?

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8 8 Hydrate Water is added in the natural state.

9 9 PROBLEM: Dissolve 5.00 g of NiCl 2 6 H 2 O in enough water to make 250 mL of solution. Calculate the Molarity. Step 1: Calculate moles of NiCl 2 6H 2 O Step 2: Calculate Molarity

10 10 You Try! Make 100. mL of a 0.50 M solution of Nickel (II) Chloride Then from that solution make a.25M solution


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