We're the Grade 11s in Mr. Doktor's chemistry 11 class.
We're in Block A, Day 1.
We are
Theresa Nguyen
Dominika Skibicki
Charles Perea
Tim Pang
This is our blog.

11/30/09 - DAY 1A

CONCENTRATION
Solution - A homogenous mixture
Solute - The one present in a smaller amount
Solvent - The one present in a greater amount
Concentration - (Amount of Solute)/(Amount of Solvent)

SOME UNITS FOR CONCENTRATION

• g/mL
• g/L
• mg/L
• mg/mL
• microgram/L

The most common and useful units are
mol/L - Molarity - Molar Concentration

• M = mol/L
• mol = (M)(L)
• L = mol/M

EXAMPLES:

• Stephanie dissolves 40.0 g of NaOH is enough water to make 200 mL of the solution. What is the concentration?
• Concentration = 40.0 g/200mL = 0.200 g/mL
• V=0.200L
• NaOH = M = 1.0 mol/0.200 L = 5.0mol/L OR 5.0 M

• Jordan wants to make 600.0 mL of 0.60 M CaCl2. What mass of solid CaCl2 is required?
• mol = 0.60 M(0.600L)
• mol = 0.36 mol
• 0.36 mol x (111.1g/mol) = 39.996 g
• Mass = 40.0 g

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