Question

Question 1 The atomic spectra of calcium and sodium were shown in experiment 9. These spectra help explain their color results for flame test. What feature(s) would you expect from the atomic spectra of potassium? Explain your reasoning.

Question 1 options:

	Since the flame test for potassium is violet, there should be a significant number of emission lines toward the 500 nm end of the spectrum.
	Since the flame test for potassium is violet, there should be a significant number of emission lines toward the 400 nm end of the spectrum.
	Since the flame test for potassium is green, there should be a significant number of emission lines toward the 500 nm end of the spectrum.
	Since the flame test for potassium is green, there should be a significant number of emission lines toward the 400 nm end of the spectrum.

Question 2 Shepp Dogg is not feeling himself because he was injured in a mosh pit; as a result, while performing part one of the experiment he dissolves his unknown solid in tap water which was processed through a water softener instead of deionized water. Explain how this might affect his results.

Question 2 options:

	This will not affect the experiment or the results.
	A water softener will add sodium to the product which will affect the results of the flame test.
	A water softener will add sodium to the product; however, this will not affect the final results because a pure solid will be used to conduct the flame test.

Question 3 (The test for sulfate ion (SO₄^2-) involved the addition of aqueous barium nitrate (Ba(NO₃)₂). Name another substance that would have been equally effective and explain your reasoning. (Hint: the formation of a precipitate proves the presence of a sulfate ion).

Question 3 options:

	Li+
	Na+
	Rb+
	Ag+

Answer 1

Q1. Pottasium produces violet flame in the flame test meaning that the emission lines will be significant in the 400 nm range

Option: 2

2. Water softeners contain Sodium and yes it will affect the final results as the solid is impure meaning a particular color will not be formed

3. Since Ag₂SO₄ is the only possible sulfate precipitate from the given metal ions, ht e answer is Ag⁺