Unformatted text preview: Name: % 55er Section: ﬁ’it65 Date: EXPERIMENT 1. Flame test for Ca“. Do ﬂame tests on a dilute solution which contains Ca2+, a more
concentrated solution which contains Ca2+, and a pure salt of Ca2+. Report your results
in the following table. Use CaC12(s) and CaCl2 solutions. Also do ﬂame tests on CaC03(s)
and CaSO4(s). Then treat CaC03(s) and CaSOJs), respectively, with 1 M HCl and repeat
the ﬂame tests. (Note: The presence of anions such as C1" are commonly necessary in
ﬂame tests to improve volatility of the ion being tested by ﬂame analysis. Nevertheless
CaSO4(s) may not be sufficiently soluble in 1 M HCl to give. istinct Ca2+ ﬂame test So carefully note your results for this investigation.) UV VJ
Substance Tested . Color Time
a 5 m CazCl M— 3 _5_ec (-5» 1M #6001 3 Sec CaCngCs: Ovagé ——
C 50 ~ m
Ca C02 (@1335; ram cg.
C4503 (wit-lei) éfﬂge; _.__... Q 3.1 Does CaSO4 give a positive test for Ca2+ by ﬂame test? Comment based on your results. W0” (:41; PM am W9- W2. Prepare a solution containing both K and Ca2+ in which [Kg ] and [Ca2+ i“ are about equal
Similarly, prepare a solution containing both Na and Ca2 "The a ﬂame test on each. Q 3.2 Describe the preparation of each solution. WW “0’ QCia—“l’ 5W<ﬁwﬁ<a = £60113: E163 0 SM [0 m at cm. 4» 3W WWI/Vac! ﬁat-“*3 efNN
Q 3. 3 Describe ﬂame test results. Can Ca2+ be 1dent1f1ed1n the presence of K by ﬂame
testing? How about 1n the presence of Na ? Comment based on your results.
Do (and describe the results of) any further tests you think are necessary to refine your decisions. m
Ear“) [333: “red W}!— W me: [New GWMK’ M . - QWJRW 3-13 ...
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