What did you observe when you burned the solutions in your bunsen burner? Why do

Question

What did you observe when you burned the solutions in your bunsen burner? Why does this happen? What is occurring at the atomic level? You should attach a drawing, but also be sure to describe the process in 1-2 sentences.

Predicted Observations ctual Observations Color: Pinkish-orange Duration:about 2 minutes alt M LiCI Red Color: Bright orange M NaNO3 Yellow Duration: About 2 minutes Color: Pale Purple M KNO3 Purple Duration:45 seconds Color: Extremely Crimson red, very bright red, white film formed M SrCl2 Red Duration: 15 seconds Color: Light green u(NO3)2 reen Duration: 5 seconds Color: Pale Purple, similar to Potassium nknown Salt Solution #1 Duration: 30 seconds Color: Crimson red, Very bright red, white film formed nknown Salt Solution #2 Duration: 30 seconds

Explanation / Answer

We observe coloured flames. Which exist for sometime.

This is because alkali and alkaline earth metals has outermost valence electron which are very loosely packed. When heated these electrons absorb sufficient energy to excite to the next energy level. These electrons remain in that excited state for very short period. When they return back to thw ground level they emit this energy in form of energy which lie in the visible region. Hence we can see coloured flames.

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.