```The Six Solution ProblemLarry Brandon                            Thornwood High School                                         17100 South Park Ave.                                         South Holland, IL 60473                                         708-339-7800 X2785Objective:     The Six Solution Problem is a logic problem assuming that the student knows some basic reactions and solubility rules.  The classic problem assumes that AgCl is a white precipitate, AgBr is yellow and Ag2CO3 is also yellow.  The combination of H+ ion and CO32- ion bubbles.  Probably the HCO3- ion is more reliable in producing bubbles.  Materials Needed:     The solutions are:            0.1 M HNO3           0.1 M NaCl           0.1 M NaBr           0.1 M Na2CO3
0.1 M AgNO3
water.

Strategy::     There are several approaches to doing this particular exercise.  I would prefer to have the students working in groups of two or three.  The solutions should be in dropping bottles wrapped together in groups of six.  Each dropping bottle should be numbered 1, 2, 3, 4, 5, and 6.  To reduce comparing results, the bottles could be filled in a different order for each group.      The results may be recorded in any way, depending on the time of the school year.  The books always say to use a 5 x 4 grid.  This makes the report neater and easier to grade, but is not necessary. ```