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MOLARITY – Ch 13, p. 412 Quantifies the concentration of a solution. Molarity (M) = mol solute = n = mol volume solution V L Read as “moles solute per liter of solution” UnitsVariables

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MOLARITY – Ch 13 Example 1: A bottle labeled “0.2 M NaCl” reads as “0.2 molar sodium chloride solution.”

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MOLARITY – Ch 13 Example 1: A bottle labeled “0.2 M NaCl” reads as “0.2 molar sodium chloride solution.” This means 1 L of the solution contains 0.2 moles NaCl.

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MOLARITY – Ch 13 Example 2: Calculate the molarity of a solution prepared by dissolving g NaCl in enough water to make a mL solution.

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Given:

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Example 2: Calculate the molarity of a solution prepared by dissolving g NaCl in enough water to make a mL solution. Given: mass = g

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Example 2: Calculate the molarity of a solution prepared by dissolving g NaCl in enough water to make a mL solution. Given: mass = g V= mL

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Example 2: Calculate the molarity of a solution prepared by dissolving g NaCl in enough water to make a mL solution. Given: mass = g V= mL Unknown:

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Example 2: Calculate the molarity of a solution prepared by dissolving g NaCl in enough water to make a mL solution. Given: mass = g V= mL Unknown: M

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Example 2: Calculate the molarity of a solution prepared by dissolving g NaCl in enough water to make a mL solution. Given: mass = g V= mL Unknown: M Need:

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MOLARITY – Ch 13 Example 2: Calculate the molarity of a solution prepared by dissolving g NaCl in enough water to make a mL solution. Given: mass = g V= mL Unknown: M Need: molar mass NaCl

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MOLARITY – Ch 13 Example 2: Given: mass = g V= mL = L Unknown: M Need: molar mass NaCl g/mol M = n= g V

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MOLARITY – Ch 13 Example 2: Given: mass = g V= mL = L Unknown: M Need: molar mass NaCl M = n= g mol V g

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MOLARITY – Ch 13 Example 2: Given: mass = g V= mL = L Unknown: M Need: molar mass NaCl M = n= g mol V g

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MOLARITY – Ch 13 Example 2: Given: mass = g V= mL = L Unknown: M Need: molar mass NaCl M = n= g mol V L g

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MOLARITY – Ch 13 Example 2: Given: mass = g V= mL = L Unknown: M Need: molar mass NaCl M = n= g mol M V L g

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MOLARITY – Ch 13 Example 2: Given: mass = g V= mL = L Unknown: M Need: molar mass NaCl M = n= g mol M V L g

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MOLARITY – Ch 13 Example 3: Calculate the moles of NaOH present in mL of M NaOH.

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MOLARITY – Ch 13 Example 3: Calculate the moles of NaOH present in mL of M NaOH. Given:

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MOLARITY – Ch 13 Example 3: Calculate the moles of NaOH present in mL of M NaOH. Given: V= mL

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MOLARITY – Ch 13 Example 3: Calculate the moles of NaOH present in mL of M NaOH. Given: V= mL molarity = M

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MOLARITY – Ch 13 Example 3: Calculate the moles of NaOH present in mL of M NaOH. Given: V= mL molarity = M Unknown: n, mol NaOH

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MOLARITY – Ch 13 Example 3: Calculate the moles of NaOH present in mL of M NaOH. Given: V= mL molarity = M Unknown: n, mol NaOH Need:

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MOLARITY – Ch 13 Example 3: Calculate the moles of NaOH present in mL of M NaOH. Given: V= mL molarity = M Unknown: n, mol NaOH Need: M = n V

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MOLARITY – Ch 13 Example 3: Calculate the moles of NaOH present in mL of M NaOH. Given: V= mL molarity = M Unknown: n, mol NaOH Need: M = n V

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MOLARITY – Ch 13 Example 3: Calculate the moles of NaOH present in mL of M NaOH. Given: V= mL molarity = M Unknown: n, mol NaOH Need: M = n n = M V V

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MOLARITY – Ch 13 Example 3: Given: V= mL molarity = M Unknown: n, mol NaOH Need: M = n n = M V V M

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MOLARITY – Ch 13 Example 3: Given: V= mL molarity = M Unknown: n, mol NaOH Need: M = n n = M V V mol L

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MOLARITY – Ch 13 Example 3: Given: V= mL = L molarity = M Unknown: n, mol NaOH Need: M = n n = M V V mol L

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MOLARITY – Ch 13 Example 3: Given: V= mL = L molarity = M Unknown: n, mol NaOH Need: M = n n = M V V mol L L

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MOLARITY – Ch 13 Example 3: Given: V= mL = L molarity = M Unknown: n, mol NaOH Need: M = n n = M V V mol L L

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MOLARITY – Ch 13 Example 3: Given: V= mL = L molarity = M Unknown: n, mol NaOH Need: M = n n = M V V mol L 1.25 mol L

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MOLARITY – Ch 13 Example 4: Calculate the volume of 0.50 M HCl that would contain 2.0 mol HCl. YOU TRY IT!

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MOLARITY – Ch 13 Example 4: Given: n= 2.0 mol HCl molarity = 0.50 M Unknown: V Need: M = n V = n V M 2.0 mol L 4.0 L 0.50 mol

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MOLARITY – Ch 13 Example 5: How would you prepare 100 mL of 0.50 M HCl from concentrated 12 M HCl? YOU TRY IT!

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MOLARITY – Ch 13 Example 5: How would you prepare 100 mL of 0.50 M HCl from concentrated 12 M HCl? Use C 1 V 1 = C 2 V 2

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MOLARITY – Ch 13 Example 5: How would you prepare 100 mL of 0.50 M HCl from concentrated 12 M HCl? Use C 1 V 1 = C 2 V 2 Given: C 1 = 0.50 M V 1 = 100mL C 2 = 12 M

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MOLARITY – Ch 13 Example 5: How would you prepare 100 mL of 0.50 M HCl from concentrated 12 M HCl? Use C 1 V 1 = C 2 V 2 Given: C 1 = 0.50 M V 1 = 100mL C 2 = 12 Unknown:

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MOLARITY – Ch 13 Example 5: How would you prepare 100 mL of 0.50 M HCl from concentrated 12 M HCl? Use C 1 V 1 = C 2 V 2 Given: C 1 = 0.50 M V 1 = 100mL C 2 = 12 Unknown: V 2 =

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MOLARITY – Ch 13 Example 5: How would you prepare 100 mL of 0.50 M HCl from concentrated 12 M HCl? Use C 1 V 1 = C 2 V 2 C 1 V 1 = V 2 C 2 Given: C 1 = 0.50 M V 1 = 100mL C 2 = 12 Unknown: V 2 =

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