chloride and the other is calcium chloride. Describe a qualitative test you could perfrom to determine which is whic? Be specific. You will need to write the chemical equations that describes any chemical reaction performed here - if appropriate.
2007-10-30 07:40:19 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Add Na2CO3 solution to each.
KCl(aq) + Na2CO3(aq) ===> No reaction
CaCl2(aq) + Na2CO3(aq) ===> CaCO3(s) + 2NaCl(aq)
To nail it, I would do a flame test on the original solution that gave no precipitate, looking for the characteristic lilac flame of K
2007-10-30 07:46:38 · answer #1 · answered by steve_geo1 7 · 0⤊ 0⤋
You could do a flame test with a platinum wire. The potassium solution should produce a pink flame. The calcium I believe will be red-orange, if my memory serves me correctly. You could also add sodium hydroxide to both solutions. The calcium will precipitate out as calcium hydroxide. The potassium solution will remain clear.
CaCl2 + 2NaOH --> Ca(OH)2 (precipitate) + 2 Na+ + 2Cl-
2007-10-30 14:49:21 · answer #2 · answered by Judi L 6 · 0⤊ 0⤋