Lab Quiz B For Flame Test Lab And Bright Line Spectra Demo

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Name: ____________________________________      Period: _____________________

Using your understanding of these labs and information in your lab notebook, answer the following questions in the space provided.

1.   When you exposed potassium (as an ion in solution) to a flame, what color did you see? ______________________

2.   In either the Flame Test Lab and/or Bright Line Demo, what is the piece of equipment you used to better detect "the color" of light you observed?

3.   From your calculations and/or knowledge of Light/energy/combined equations, how are Energy (E) and Wavelength (λ) related?
a.  Directly
b.  Indirectly ( I call it Inversely)
c.  Is the same numeric value but different units
d.  Need more information to answer question

4.   Why is the Bright Line Spectrum unique to each element?
a.  It represent the mass of the element /atom (and all elements have different masses)
b.  It represents the volume of element/atom (with more lines indicating a larger volume)
c.  It represents the movement of electrons in the element/atom (with each element having a different number of lines/electrons moving)
d.  It is not unique to each element.

5. From your data, what pairs (or greater 2) of "atoms" produced the same color (if you assume only ROYGBIV are colors, no mixed colors) and what is that color?

6. On the back of this paper, give answer to Question 2 on Questions for Flame Test Lab. (Remember, we only "see" emitted light/energy not absorbed light/energy).

7. You had two objectives for this lab. Write the 2nd conclusions you made from these objectives. When you need to reference the Bright line spectrum from your lab data, describe them in your explanation using the following method, 2 red line, 1 green and 4 blues.

8) On the back of this page, please show all appropriate work to determine the energy of one of your observed colors (from one of the "atoms").

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Last edited November 2, 2023 9:31 am (diff)