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Topic: partial molar quantity or volume - volumetric makeup  (Read 1417 times)

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Offline yakababy

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partial molar quantity or volume - volumetric makeup
« on: April 21, 2015, 10:13:47 AM »
anyone can help?  ??? ??? ??? ??? ???

 Volumetric make-up

08:00 to prepare 1-L of 0.02 M ethanol/water solution of KCl
08:01 weighs 1.49 g of KCl (mm = 74.55 g/mol) -> 0.02 mole
08:03 dissolves in 200.00 mL distilled water
08:05 filling up V-flask with neat ethanol to 1000.00 mL
08:07 Breakfast !!!
09:00 Solution level in V-flask dropped sig. below the mark !
09:01 adds neat ethanol up to the mark again

• How much extra neat ethanol did he have to add to make
up the 1000.00-mL mark again?
• Was it the correct way to make up to the mark again?


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