What Makes Water Hard? AP Lab #3 Chemicals_EZ-Prep and a 3-element prism stack

and a 3-element prism stack mounted in a wooden carrying case provide rapid spectral examination of light sources

sized to fit the PH0380A bar-breaking apparatus for repeated thermal-contraction fracture demonstrations

Paired with simulated antigen-antibody reagents for safe classroom use

this wide-mouth LDPE wash bottle delivers controlled flow through a self-venting leak-proof nozzle

a Buchner funnel

What Makes Water Hard? AP Lab #3 Chemicals_EZ-Prep and a 3-element prism stackStudents will investigate the suitability of gravimetric analysis for determining the amount of water hardness in the form of calcium carbonate found in various water samples. The activity contains enough materials for 15 groups of students as well as a Teacher?s Guide and Student Study Guide Copymasters. Meets Big Idea 1, Investigation 3, Primary Learning Objective 1. 19.