exp 17 changes

[robert zellmer]

There's a change in the volumes of Dye to use in Part A.  The first table
has volumes of 4, 6, 8 and 10 mL of Dye.  We're changing these to
5, 6.5, 8 and 10.  There were some problems with the 4 mL one today,
probably because the rooms were rather warm.  Also, there may have
been some problems because some people measured volumes slightly
below the 4 mL or had air bubbles in the tip of the buret.  You have to
make sure you don't have air bubbles or you won't get the proper volumes.
If you see a meniscus in the tip when you've got fluid in the buret it means
there's air above it.

Dr. Zellmer