A: Use scoopula to add a small amount 1 Specific to Rxn F: Add 10 drops of Cuso

Question

A: Use scoopula to add a small amount 1 Specific to Rxn F: Add 10 drops of Cuso Rua Usdisposable pipette to add 10 of Na-co. of HCl Rxn B: HCI + Na2CO3 Specific to Rxn B: Use disposable pipette to add 10 drops Specific to Rxn G: Add 10 drops of Cuso. of HCI. Quickly add 10 drops of Na CO of BaClz .Rrn C: HCl + NaOH Specific to Rxn C: Use disposable pipettes to add 10 drops Specific to Rxn H: Add 10 drops of CuSO. A of HCI and 2 drops of universal indicator. Record color of of NasPO mixture. Quickly add 12 drops of NaOH Specific to Rxn I: Add 10 drops of Nici. Add Specific to Rxn D: Add 10 drops of NaOH. Add 10 drops of NasPO of FeCl. Specific to Rxn J: Add 10 drops of BaCl. Ad Specific to Rxn E: Add 10 drops of CoCl Add 10 drops of NasPO of AgNO. RxnK: NH4C1+AgNO Specific to Rxn K: Use scoopula to add a smal (pea-sized) of NH.CI. Add 10 drops of AgNO PART C: Identification of an Unknown Solution Using Double Displacement Rea 1. Obtain an Unknown bottle and record the Unknown code. Each Unknown is one of the colorless s previously used in Part B. Using the available solutions and solids, use knowledge gained from Part B to design a short serie to identify your Unknown. Fill out Report Sheet Part C completely and write balanced molecula each reaction. Identify your Unknown in the appropriate blank on Report Sheet C. Justify your choice, highlig reactions that resulted in the positive identification of your Unknown. 2. 3.

Explanation / Answer

A. 2 HCl (aq) + CaCO3 (s) -----> CaCl2 (aq) + H2O (l) + CO2 (g)
(precipitate should not form since CaCO3 is soluble in HCl)
B. 2 HCl (aq) + Na2CO3 (s) ------> 2NaCl + H2O (l) + CO2 (g)
C. NaOH (aq) + HCl (aq) -----> NaCl (aq) + H2O (l)
D. FeCl3 (aq) + 3 NaOH (aq) -----> Fe(OH)3 (s) + 3 NaCl (aq)
E. CoCl2 (aq) + 2 AgNO3 (aq) -----> 2 AgCl (s) + CoNO3 (aq)
F.  CuSO4 (aq) + Na2CO3 (aq) -----> CuCO3 (s) + Na2SO4 (aq)
G. BaCl2 (aq) + CuSO4 (aq) ------> BaSO4 (s) + CuCl2 (aq)
(white precipitate will form in this reaction)
H.  3 CuSO4 (aq) + 2 Na3PO4 (aq) -------> Cu3(PO4)2 (s) + 3 Na2SO4 (aq)
I.  2 Na3PO4 (aq) + 3 NiCl2 (aq) -----> Ni3(PO4)2 (s) + 6 NaCl (aq)
J.  3 BaCl2 (aq) + 2 Na3PO4 (aq) -------> Ba3(PO4)2 (s) + 6 NaCl (aq)
K.   NH4Cl (aq) + AgNO3 (aq) ------> AgCl (s) + NH4NO3 (aq)

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