EXP #10: PRE-LAB EXERCISE 1, Missy Mae is given an unknown white ionic solid whi

Question

EXP #10: PRE-LAB EXERCISE 1, Missy Mae is given an unknown white ionic solid which contains ofone cations, Na,K, Ca and one of the anions CI, NO, SO4 Wite he compound. 2. Missy Mae performs a flame test on the unknown compound, which reveals a lilac color. An aqueous solution of the unknown compound yields the following results: .forms no precipitate when 0.10 M sodium sulfate is added Forms a precipitate when 0.10 M silver nitrate is added .Forms no precipitate when 0.10 M barium nitrate is added What is the formula of the unknown compound? Explain your reasoning. . There is no precipitation test for nitrate ion. Explain why this is the case

Explanation / Answer

1. The white unknown compounds could be

1. NaNO3

2. Na2SO4

3. KCl

4. CaSO4

5. K2 SO4

6. KNO3

2. The unknown compound is KCl

3. Because NO3- ion solubility is more so it can easily dissolve in solvent.

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