February 5

White Before Your Eyes Mystery Powder Experiment 🔬

📅 Lab Started: February 5 | Lab Write-Up Due: February 6 (Beginning of Class)

In this experiment, you worked as a chemical detective to identify four mystery powders by observing their physical and chemical properties.

What You Did in the Lab:

1️⃣ Observing the Substances & Liquids

• Examined four mystery powders (A, B, C, D) and recorded their color and texture.

• Observed the three test liquids: Water, Vinegar, and Iodine and noted their properties.

2️⃣ Mixing the Substances & Recording Reactions

• Mixed each mystery powder with water, vinegar, and iodine to observe possible chemical reactions.

• Recorded signs of chemical changes, such as:

  • Bubbling/Fizzing (Gas production)

  • Color Change

  • New Substance Forming (Precipitate)

3️⃣ Identifying the Mystery Substances

• Used chemical reaction data to determine the identity of each mystery powder.

• Completed the conclusion questions about chemical vs. physical changes.

Key Takeaways:

✅ Physical changes do not create new substances, while chemical changes do.
✅ Certain substances react differently to acids (vinegar) and iodine, helping identify their composition.
✅ This experiment models real-world chemistry applications, like forensic investigations and food science.

📌 Reminder: Your lab write-up is due February 6 at the beginning of class. Make sure all data tables and conclusion questions are completed! 🧪✨