This lab activity engages students in problem solving, a creative act, and not “problem doing,” the usual method encountered by students which has predetermined results. Students test two unknown and seven known chemical solutions with bromthymol blue solution. They then use their results to make conclusions about what bromthymol blue detects and what might be in two unknown solutions.

Kit Contents:

16 x Lab-Aids® Chemplates® w/Stir Stick
1 x Bottle of Unknown Solution I
1 x Bottle of Unknown Solution II
8 x Bottles of Bromthymol Blue Solution
1 x Bottle of Solution No. 1, 0.1M HCl
1 x Bottle of Solution No. 2, 0.1M, H2SO4
1 x Bottle of Solution No. 3, 0.1M, NaOH
1 x Bottle of Solution No. 4, 0.1M, KOH
1 x Bottle of Solution No. 5, 0.1M HNO3
1 x Bottle of Solution No. 6, 0.1M Ca(OH)2
1 x Bottle of Solution No. 7, 0.1M Zn(NO3)2
30 x Student Worksheets and Guides
1 x Teacher’s Guide with MSDS