Solution Concentration

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Solution Concentration
AKA Strength of Solution
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Parts of a Solution Measuring Strength of
Solution

• Solute
• Solvent
• Solution concentration is the amount of solute
  dissolved in a specific amount of solvent (no
  mention of temp.).
• Its abbreviated soln and depends on the amount
  of solute.
• Solution concentration can be expressed
  qualitatively or quantitatively.

Two Parts of a Solution
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• Qualitatively (in words)
• Measuring Strength of Solution
• dilute a very small amount of solute with lots
  of water weak
• concentrated a large amount of solute with a
  little water strong

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Example

• Which one is dilute and which one is concentrated?

Concentrated (darker color means less water and
more tea)
Dilute (lighter color means more water and less
tea)
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• Quantitatively (in numbers) Measuring Soln
• Percent By Mass medicated creams
• Percent By Volume rubbing alcohol
• ppm,ppb water contaminants
• Molarity used by chemists
• Molality used by chemists
• We will focus only on percent by mass and
  molarity! ?

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Quantitatively Measuring Strength of Solution
Percent By Mass
(g solute g solvent)
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Try These

• What is the percent by mass of 20.0 grams of
  NaHCO3 in a 600. mL solution?
• 1 gram H2O 1 mL H2O
• 600. mL ____ g

600.
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3.33 NaHCO3 in the solution
.033333 x 100
DILUTE SOLUTION
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• 2. Find the percent by mass of NaCl in an
  aquarium that has 3.6 grams of NaCl in 100. g of
  water.

10
3.5 NaCl in solution
.034749 x 100
DILUTE SOLUTION
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Quantitatively Measuring Strength of Solution
Molarity (M) (molar concentration)
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Try These

• Stomach acid is a 0.10 molar HCl solution. How
  many moles of HCl are in 1500 mL of stomach acid
  solution?
• 
  
• 
  

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Try These . . .

• What is the molarity of a solution that contains
  55 g of CaCl2 in 500 mL of solution?