This kit has been designed to allow the analyst to perform a very simple titration to determine the hardness of their freshwater sample. The titration uses an easily identifiable color transition to indicate the end of the analysis. The kit contains everything an analyst would need to perform a water analysis either in the laboratory setting or out in the field. Kit contains enough materials to perform 40 tests. Aligned to the Next Generation Science Standards (NGSS)* Disciplinary Core Ideas: PS1.A; PS1.B Performance Expectations: MS-PS1-2 Cross Cutting Concepts: Structure and Function Engineering Practices: Developing and Using Models Kit Contents: 6 Plastic Pipettes 3 Reaction Vessel 3 Collection Bottle 1 Measuring Tube 2 Titrator 3mL 3 X 60mL EDTA Titrant, 0.005M 60mL pH 10 Buffer Solution 15mL Ericochrome Black T Indicator Solution DOT Info: Small quantity exemption 173.4 THIS PACKAGE CONFORMS TO 49 CFR 173.4 for domestic highway or rail transport only *”Next Generation Science Standards” is a registered trademark of Achieve. Neither Achieve nor the lead states and partners that developed the Next Generation Science Standards was involved in the production of, and does not endorse, this product.