Chemistry Reference Set I includes: Solubility Curves, Ionization Energies and Electronegativities, Relative Strengths of Acids in Aqueous Solution at 1 atm and 298K, and Solubilities in Water. This set of 4 charts is designed specifically for the chemistry lab and classroom. Each chart is printed on heavy 17" x 20" paper stock, in different colors and shipped rolled in a tube. FREE SHIPPING in U.S. Outside U.S. contact us for shipping charges. Buy all three (3) sets of Chemistry Reference Charts and SAVE $12! The price for all three sets is $60.00 - see item #2018.