iiy needs you to help straighten Otmes, the contents of each of the six bottles
ID: 542753 • Letter: I
Question
iiy needs you to help straighten Otmes, the contents of each of the six bottles are known. IUl Known is which bottles contain what. Consulting any resources available to yUD, determine what each bottle contains without using any additional chemicals The bottles contain 25 mL of each solution, and it is known that all solutions are 0.1 M. Remember, yoru will need to evaluate whether any requested reagents pose safety or disposal issues. Set 1: Zn(NO3)2 (aq), KI (aq), KCI (aq), AgNOs(aq), MgCl2 (aq), NaOH (ag Set 2: Pb(NOs)2(aq), KI (aq), Na:COs (aq),ZnSO* (ag), Zn(NOs) Ca), HC() . Set 3: ZnCl2 (aq), AgNOs (aq), Fe(NOs)s (aq), FeCls (aq), Pb(NOs) (a), NaOH (aq) Set 4 KI (aq), Zn(C2Hs02)2 (aq), Na.COs (aq), AgNO ag), FeCh (ag), FeiNos)p (ag) Set 5: AgNOs (aq), NaCl(aq), BaCl2 (aq), CuCl (ag), Cu(NOs)p (ag), Cus0aGag) Set 6: NaCl (aq), Pb(NO3)2 (aq), NaOH (aq), BaCl2 (a), CuCl: (aa), CuSos(ag) Set 7: Na2CO: (aq), AgNOs (aq), Fe(NO)s (a), FeCls (aq), BaCl:(ag), NaOH (aa) Set 8: Na2COs (aq), Pb(NO3)2 (aq), Zn(NOs)2 (aq), KBr (aq), NazSO (ag), BaClb (ag) Set 9: AgNOs (aq), NaOH (a), HCI (a), BaClb(ag), Cul(NOsh (op), Cuso(on) ti tanivmExplanation / Answer
1)Test for KI
Test for Iodine
Prepare a starch solution by dissolving 0.1g of soluble starch in 10mL of distilled water.
Place about 20 drops of the sample solution in a test tube and add 1 to 2 drops of household bleach (sodium hypochlorite). The sample should turn brownish-red if iodide is present.
Shake the test tube and add 4 or 5 drops of starch solution. A dark blue coloration upon addition of the starch confirms the presence of iodide.
POTASSIUM TEST
Cut a piece of copper wire about 6 inches long and form one end into a loop.Dip the loop into the sample solution.
Hold the other end of the wire with pliers or tongs, and then place the looped end that you dipped in the sample solution in a blue-hot flame. A flame color of red-violet indicates the presence of potassium.
2) reaction with sodium acetate or ammonium sulfide yields a white precipitate, with hydrogen sulfide, that is insoluble in acetic acid but soluble in hydrochloric acid; reaction with potassium ferricyanide yields a white precipitate that is insoluble in hydrochloric acid (zinc test)
reaction with sulfuric acid and alcohol yields ethyl acetate with its characteristic odor; reaction with ferric chloride produces a deep red color that is destroyed by the addition of mineral acids (acetate test)
3) Test for Na2CO3
upload some drops of HCl to samples of the two. The sodium carbonate will bubble as CO2 gas is developed. there'll no effervescent with NaCl. Na2CO3(s) + 2HCl(aq) --> 2 NaCl(aq) + CO2(g) + H2O(l)
4) Test for AgNO3
A typical reaction with silver nitrate is to suspend a rod of copper in a solution of silver nitrate and leave it for a few hours. The silver nitrate reacts with copper to form hairlike crystals of silver metal and a blue solution of copper nitrate:
Silver nitrate decomposes when heated:
5) Test for FeCl3
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