Teacher resources and professional development across the curriculum

Teacher professional development and classroom resources across the curriculum

Monthly Update sign up
Mailing List signup
Reactions in Chemistry
Broadcast ScheduleRegisterAbout the WorkshopSupport MaterialsSite MapChannel-Talk
Sub Image2:Macro to Micro Structures
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: Hauser, Michael (MHauser@stlcc.edu)
Date: Sun Feb 02 2003 - 22:32:26 EST

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 different
meaning (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


© Annenberg Foundation 2017. All rights reserved. Legal Policy