My unknown - Elizabeth Slonena Section 0770 Unknown 9A/9B...

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Possible Ions Elizabeth Slonena Section 0770 Unknown 9A/9B Cations: Na + , K + , NH 4 +, Ca 2+ , Mg(H 2 O) 6 2+, Al(H 2 O) 6 3+, Zn(H 2 O) 6 2+, Cu(H 2 O) 6 2+ , Ag(H2O)2 + Anions: Cl−, NO3−, SO4 2 −, HSO4−, OH− (or O 2 −), CO3 2 −, HCO3− , S2−, HS− Possible insoluble compounds : Ca(OH) 2 , CaSO 4 •2H 2 O, CaCO 3 , Mg(OH) 2 , MgCO 3 , Zn(OH) 2 , ZnO, ZnCO 3 , ZnS, CuCO 3 , CuO, CuS, Ag 2 CO 3 , Ag 2 O, Ag 2 S, AgCl Preparation 1) Prepare the “ Neutral Water o Add a counted number of drops of deionized water to a clean vial o Add 1-2 drops of HBtB, color should be yellow due to slight acidity o Add a counted number of drops of tap water until color changes to green pH 7.0 2) Clean stuff 3) Get Stuff o 6M HAc o Sodium cobaltinitrite reagent [Na 3 CO(NO 2 ) 6 ] o Red and Blue litmus paper o 0.02M AgNO 3 o 1M HNO 3 o 16M HNO 3 o 0.25M Ba(NO 3 ) 2 o 18M H 2 SO 4 o Single crystal of Fe(OH 2 ) 6 (NH 4 ) 2 (SO 4 ) 2 o Saturated NH4Cl o .5M Na2Co3 o 1M NaOH o 2M H 2 SO 4 MgCO 3 o 1M HCl o .1 M NaCl o Na 3 Co(NO 2 ) 6 o NaAc o TAA o Bromphenol Blue, Bromcresol Blue, Bromcresol Green, Alizarian Yellow R NOTE: 9A ) is a pure salt , which means it only contains two (one cation and one anion) or three ( alums , two
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cations and SO 4 2 ) ions. For Alum: 1 cation must be Al(H20) 6 3+ other cation must be either NH 4 or K+ 1. Describe Sample : Phase, color, odor, and crystal shape if crystalline 2. Test on Original Sample Flame Test - Bright “bushy” orange: Na + (K + , NH 4 + , Ca 2+ , Mg(H 2 O) 6 2+ still possible) - Red/ orange: Ca 2+ (no Na + , maybe others) - Light purple: K + (no Na + nor Ca + , maybe others) - Green: Cu(H 2 O) 6 2+ - No color: NH4 + , Mg(H2O)6 2+ , Al(H2O)6 3+ , Zn(H2O)6 2+ , Ag(H2O)2 + (no Na + , no Ca 2+ , no K + ) Notes: It is difficult to distinguish the color using solid samples, if you are not sure what color your sample have, you can use the original solution you make or the sample treated with
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This note was uploaded on 02/23/2011 for the course CHEM 2046L taught by Professor Horvath during the Fall '10 term at University of Florida.

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My unknown - Elizabeth Slonena Section 0770 Unknown 9A/9B...

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