Emission Analysis of Aqueous Solutions of Groups IA and IIA Metal Salts
A student records two potassium emission spectra: 1) one using 0.10 M KNO3 solution; 2) one using 0.10 M K2SO4 solution. Will significant differences be observed in the two emission spectra? Why or why not?
2 answers
I don't think so. The emission line(s) for K^+ are the same regardless of the salt. Generally, the nitrates are easier to volatilize in a flame and the intensity of the spectra may be a little stronger in nitrate salts than in sulfate salts for that reason but I wouldn't expect any other differences.
1. A student uses 6M HCl solution contaminated with Al(NO3)3 to wash the nichrome wire in between recordings of emission spectra for the different known and unknown metal ion solutions. The emission energies for the aluminum are 3.90x10^-19 J/atom, 3.58x10^-19 J/atom, and 2.97x10^-19 J/atom. How might this experimenntal error affect the identification of the metal ions present in the unknown sample? Why or why not
I am guessing yes, but I am not so sure why it would.
2. A student records two potassium emission spectra: 1) one using 0.10 M KNO3 solution; 2) one using a 0.10 M K2SO4. Will significant differences be observed in the two emission spectra? Why or Why Not? Not quite sure how to answer this...
I am guessing yes, but I am not so sure why it would.
2. A student records two potassium emission spectra: 1) one using 0.10 M KNO3 solution; 2) one using a 0.10 M K2SO4. Will significant differences be observed in the two emission spectra? Why or Why Not? Not quite sure how to answer this...