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Chapter 12 Lecture 1

# Chapter 12 Lecture 1 - Vodka is 80 proof what is 40 by...

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Chapter 12: Physical Properties of Solutions Solution = Solvent + Solute Examples: CH 4 + H 2 S CO 2 + H 2 O Vodka Salt Water Brass H 2 + Pd Homogeneous

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Concentration Why make solutions? Molarity (M) Sub Units moles solute/L solution Find the molarity of a solution made by dissolving 400 g of C 6 H 12 O 6 in 1.2 L of solution? (Chapter 3, 85)
Other concentration units. Mass Percent (mass%) Sub units: grams solvent/100 g solution Find the mass% of HCl in a solution Made by adding 5 grams HCl (g) in 27 grams of water?

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Volume % Sub units: mL volume of solute/100 mL of solution Find the volume % acetone in a solution made by Adding 10 g of acetone (CH 3 COCH 3 ) and filling the container up to 1.55L? (density acetone: 0.789 g/mL)
Conversion from Mass % to Volume %

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Unformatted text preview: Vodka is 80 proof what is 40% by volume ethanol. ( 2 proof = 1 volume %) the mass % of ethanol in Vodka? Density of ethanol is 0.789 g/mL Density of Vodka is 0.973 g/mL Now find the molarity (M) of ethanol in Vodka Mass/Volume % Sub Units: Grams solute/ 100 mL of solution (concentrated) (most popular): mg solute/dL of solution (dilute) Standard Saline solution is 0.92% NaCl. What is the molarity (M) of this solution? Very dilute solutions: ppm = 1 per 1,000,000 DP’s working definitions ppm = mg/L or μg/mL ppb = μg/L or ng/mL ppt = ng/L or pg/mL No need to worry about density 40 ppb Pb in paint is what molarity (M)?...
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Chapter 12 Lecture 1 - Vodka is 80 proof what is 40 by...

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