Explore the interesting properties of nanomaterials by reducing a solution of gold (III) chloride to form colloidal gold nanoparticles. As the reaction occurs, the mixture undergoes multiple color changes before becoming the bright red color characteristic of small gold nanoparticles. There are enough materials to complete the demonstration 5 times. Aligned to the Next Generation Science Standards (NGSS)* Disciplinary Core Ideas: PS1.A; PS1.B; PS4.A; PS4.B; PS2.B Performance Expectations: MS-PS1-2; MS-PS4-2; HS-PS2-6 Cross Cutting Concepts: Patterns; Structure and Function Engineering Practices: Analyzing and Interpreting Data; Developing and Using Models; Obtaining, Evaluating, and Communicating Information Kit Includes: 100 mL Gold (III) Chloride Solution, 1M 10 mL Sodium Citrate Solution, 1% 50 mL Sodium Chloride Solution, 1M DOT Info: Non-regulated *"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.