Number of results: 10
Many used chloroform or dichloromethane in the past but I think most use water now. http://spot.pcc.edu/~chandy/241/CaffeineExtractionCH2CCl2.pdf
Thursday, October 13, 2011 at 10:38am by DrBob222
As Dr Russ suggested, do the math in the base 16 itself Make yourself a table for both addition and multiplication in base 16, a nice exercise in itself. Or you could just print them out from this webpage, find them near the bottom http://www.pcc-services.com/binhex.html
Friday, November 14, 2008 at 8:37am by Reiny
Sunday, December 11, 2011 at 8:37pm by pcc.edu
Explain which of the following aqueous solutions has the strongest ion-dipole attractions: 0.3 M FeBr3, 0.6 M CaCl2, 0.5 M Ba(NO3)2, 0.2 M (NH4)2SO4, 0.9 M KOH.
Tuesday, December 4, 2012 at 8:56am by Amsterdam
21.7mL of 1.50M H2SO4 contains .0217*1.50 = .03255 moles of H2SO4 Each mole of H2SO4 reacts with 2 moles of KOH. So, the 40mL of KOH contained 0.0651 moles. .0651mole/.040L = 1.6275M
Monday, July 15, 2013 at 4:24pm by Steve
A volume of 40.0mL of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SO4). What was the molarity of the KOH solution if 21.7mL of 1.50 M H2SO4 was needed? The equation is 2KOH(aq)+H2SO4(aq)→K2SO4(aq)+2H2O(l)
Monday, July 15, 2013 at 4:24pm by jose
EPSY 381: Practicum A final grade will be recorded on your Competencies Contract, and we will return a copy of this form to you along with your product. ... (Broken Link Removed) PROFESSIONAL COMPETENCIES CONTRACT This student has met the Professional Competencies Contract (...
Monday, January 26, 2009 at 7:27am by Writeacher
There are a large number of reagents that will carry out this oxidation. Some examples are Jones reagent http://en.wikipedia.org/wiki/Jones_oxidation and PCC http://en.wikipedia.org/wiki/Pyridinium_chlorochromate
Monday, December 21, 2009 at 4:10pm by Dr Russ
3-hexene is CH3CH2CH=CHCH2CH3 which is nice and symmetrical. Thus if we do an addition across the double bond we are not concerned about Markovnikov's rule ((Broken Link Removed) Similarly as the final product is a ketone any possible chiral centre(s)generated are destroyed, ...
Monday, October 5, 2009 at 4:19am by Dr Russ
I don't know which reagent you started with. Assuming that you used ordinary bleach (from the many recent threads on this subject), then there are many other possible oxidising agents to achieve the oxidation. Here are a few Jones Reagent see http://en.wikipedia.org/wiki/...
Thursday, February 4, 2010 at 5:34am by Dr Russ