Which two elements would be hard to differentiate using flame tests alone?
1
Question 1
1.
Information from ion chromatography shows:
the presence of _____________ ions.
the relative abundances of ion from ______________ (least) to _____________ (most)
Test tube tests and results
Adding acid shows carbonate ions by ____________ and the gas turns lime water ___________ )
Adding silver nitrate shows chloride ions by __________ precipitate of ____________________
Adding barium nitrate shows sulfate ions by white precipitate of ___________________
Other Answer Choices:
carbonate
fluoride
chloride
fizzing
silver chloride
barium sulfate
cloudy
white
Question 2
2.
match the positions of lines (wavelengths) on the line ____________ spectrum to the known ______________ of lines for individual ions given in the reference book
Other Answer Choices:
samples
positions
Question 3
3.
What conclusions can you make about which elements the mineral does and does not contain? Give your reasons
sodium
rubidium
unidentified ion
potassium
lithium
Does contain / spectra match for
Does not contain / spectra do not match for
Question 4
4.
explain why neither the flame test nor the emission spectra data can be used to identify all of the elements in the mineral.
Unknown elements
Flame test: other elements ‘___________ ’ by strong colour
Spectrum: Some __________ lines indicate unknown element
Need spectra of other ____________ elements to identify
Other Answer Choices:
extra
masked
unknown
Question 6
6.
Why can magnesium not be identified with a flame test