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Sub Image2:Macro to Micro Structures
         
 
Workshops
1) Atoms and Molecules2) Macro to Micro Structures 3) Energetics and Dynamics 4) Theory and Practice in Chemical Systems 5) Chemical Design 6) The Chemistry of Life 7) Chemistry and the Environment 8) Chemistry at the Interface
 
From: tfalcone@comcast.net
Date: Tue Feb 04 2003 - 19:10:02 EST


Thanks that is good! Tina Falconer
----- Original Message -----
From: "Hauser, Michael" <MHauser@stlcc.edu>
To: <channel-talkchemistry@learner.org>
Sent: Tuesday, February 04, 2003 1:31 PM
Subject: RE: [Channel-talkchemistry] Workshop Video 2

> You need a serial dilution, similar to what was shown in the video. You
take
> 1 mL of first solution and add up to a volume of 10.0 ml with water. THEN
> take 1 mL of THAT solution, and dilute it by 10:1. Dilute this new
solution
> in the same way, etc and each solution will be an order of magnitude more
> dilute.
>
> Michael Hauser
>
> -----Original Message-----
> From: MARTINA FALCONER [mailto:tfalcone@comcast.net]
> Sent: Tuesday, February 04, 2003 7:17 AM
> To: channel-talkchemistry@learner.org
> Subject: Re: [Channel-talkchemistry] Workshop Video 2
>
>
> If you are trying to show pH, wouldn't that mean the second dilution
> would have to be 100 to 1, the third 1000:1 ? I think maybe that would
> be too difficult to show that way - am I wrong? Tina
>
>
>
> ----- Original Message -----
> From: "Hauser, Michael" <MHauser@stlcc.edu>
> Date: Sunday, February 2, 2003 8:32 pm
> Subject: [Channel-talkchemistry] Workshop Video 2
>
> > Hello All-
> > I enjoyed the demonstration by Pernell Williams regarding the
> > dilution of
> > food coloring. I do want to point out that students should be
> > determining if
> > the solutions are COLORLESS as opposed to CLEAR. These words have
> > differentmeaning (Windex is blue color but is clear - you can even
> > read the label
> > through the back side of bottle). I am also curious why 5:1
> > diliutions were
> > used when a 10:1 dilution would be a great way to introduce the pH
> > scale and
> > log scale. Comments?
> >
> > Michael Hauser
> >
> >
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>
>
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