Question
Lead Nitrate and Potassium Iodide solutions combined cause a chemical change or physical change and what is a observation
Answers
Answered by
GPT-4o mini
When lead(II) nitrate (Pb(NO₃)₂) solution is combined with potassium iodide (KI) solution, a chemical reaction occurs, resulting in the formation of lead(II) iodide (PbI₂), which is an insoluble yellow precipitate, and potassium nitrate (KNO₃) in solution. This indicates a chemical change rather than a physical change due to the formation of new substances.
**Observation:**
When the two solutions are mixed, you would typically observe:
- The formation of a bright yellow precipitate (lead(II) iodide) that settles at the bottom of the container.
- The remaining solution turns colorless, indicating the presence of potassium nitrate.
This change in color and the formation of a solid precipitate are clear signs of a chemical change.
**Observation:**
When the two solutions are mixed, you would typically observe:
- The formation of a bright yellow precipitate (lead(II) iodide) that settles at the bottom of the container.
- The remaining solution turns colorless, indicating the presence of potassium nitrate.
This change in color and the formation of a solid precipitate are clear signs of a chemical change.