Students will investigate equilibrium and Le Chatelier's principle through four different experiments. They will apply various stresses to different chemical systems at equilibrium, then use their understanding of Le Chatelier's principle to explain their results. Kit contains enough material for 15 groups. Teacher's Guide and Student Study Guide Copymasters are included. Aligned to the Next Generation Science Standards (NGSS)* Disciplinary Core Ideas: PS1.B Performance Expectations: MS-PS1-2; HS-PS1-6 Cross Cutting Concepts: Patterns; Stability and Change Engineering Practices: Analyzing and Interpreting Data; Constructing Explanations and Designing Solutions Kit Includes: 25mL Bromothymol blue 50mL Sodium hydroxide, 0.1M 25mL Hydrochloric acid, 0.1M 150mL Potassium thiocyanate solution 25mL Ferric nitrate solution 15g Potassium thiocyanate crystals 15g Sodium phosphate crystals 150mL Copper (II) sulfate solution 100mL Ammonium hydroxide, 1M 25mL Hydrochloric acid, 1M 50mL Methyl red 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.