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April 18, 2015

Homework Help: Chemistry Help ????

Posted by SARAH on Sunday, November 23, 2008 at 6:40pm.

Experiment - Recrystallization of a solid

Purpose

in this experiment acetanilide will be recrystallized from water, which serves as the solvent..


Pre-Lab Questions....


Explain the purpose of the following in this experiment.

a) using hot filtration

b) not cooling (chilling) the hot filtered solution immediately

c) washing the crystals in the final step with ice cold water

d) using gravity filtratoin ( not vacuum filration) in the hot filtration step

e) using a stemless funnel in the hot filration step

-------------------------------------
in the experiment we have to determine the MP ( literature value 114 C ) ... and percent mass recovery of acetanilide in teh orginal mixture ..

ANY clue how to approach to dese problems.. or is dere any kind of formula .. ot steps ..


THANKS A LOT


IS THERE ANYONE WHO CAN HELP ME >.>

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