9-LW Analysis of dry matter (control task).
Each student receives a bottle of unknown solid substance whose composition must be installed.
The task:
Set the composition of solids(оperation watch p.110-114). The result of the issue the report, which should reflect the procedure for opening the ion reaction equations the opening, the observed effects, the circuit opening.
Objective: to Master the technique of fractional systematic analysis of an unknown salt. To determine which ions are part of the salt, the aqueous solution which is issued in the quality control and analytical tasks.
Equipment: stand with test tubes, time and subject of glass, nichrome wire, glass rod, filter paper, pipettes, water bath.
Reagents: Ag NO3, HCl, Pb(NO3 )2, BaCl2, H2SO4, CaCl2, NaOH,KOH, Cr Cl3, AlCl3, ZnCl2, FeSO4, FeCl3, MnCl2, MgCl2 , CuSO4, HgCI2, CdCI2, NiCI2, CoCI2, NH 4 Oh, , Nessler's reagent, ,,
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