>> Disappearing Powder - Investigating Solubility

Pre-lab: 
Vocabulary: mixture; solution; solubility; solute; solvent; unsaturated- 
and saturated solutions.
Show video segment, "Acids, Bases, Salts, and Solutions" [0:06:30 - 
0:19:50 (end), 13:20 total runtime]; text reference (Holt _Physical 
Science_, pp. 98-103).

> Part 1: Creating and Interpreting Solubility Graphs
(x) - Register for free trial account with ExploreLearning.com
the "Teacher + Students Free Trial"
==2006-2007==
E-mail address: Tiffany.Bowers@fcps.edu
Username: msbowers (both all lowercase)
Password: sciencerules
==2007-2008==
E-mail address: wsanford
Password: wolverine
E-mail address: Victoria.Karg@fcps.edu
Username: mskarg (both all lowercase)
Password: sciencerules
(x) - Sign up for Mobile Lab [2 days or (x)one block day]
(x) - Search stack of old handouts (right of PC monitor) for stuff re:
solutions lab.
(x) - Print/review handouts I recently posted online; compare with older
version(s) of activity, including making the graph using Logger Pro (a 
two-line graph).
Data Set & Graph: KNO3 + NaCl; 5-95degC, by 5deg increment.
(x) ***Add data table to ver2.doc***
(x) ***Create & save MrPerfect CBL-graph.***
Title: The Effect of Temperature on Solubility

> (x)Before Part 2: Print and ***photocopy PB1LR (~25 copies)***
Part 2: Investigating the Effect of Particle Size on Crystal Dissolving
Time
Three crystal sizes of NaCl: small (lab-grade table salt); medium (kosher 
salt); large (rock salt). Note: Use a mortar and pestle to grind small 
salt crystal into finer-grained particles. This is CRITICAL in order to 
insure dissolving times that are significantly different for the small- 
and medium-size particles!