National Standards for Grade Levels 7-10
 
Students determine molarity experimentally using a simple titration method with an indicator solution. In Experiment 1, students determine the molarities of four different sodium hydroxide solutions. In Experiment 2, students determine the molarities of four different hydrochloric acid solutions. Includes background information for lecturing and reproducible student worksheets for learning to write chemical formulas and calculate formula mass, concentration, molarity, and molar mass. Kit includes prepared solutions, reproducible procedures for laboratory experiments, worksheets, assessment, and answer keys. Allow one hour lab time for experimentation. Designed for 24 students working in groups of four. Required but not included: goggles, evaporating dishes, and stirring rods.