Lab 25_Help sheet edited

Lab 25_Help sheet edited - Ag+ Separation Confirmation...

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Ag + Separation Æ cold, dilute HCl Confirmation Æ HNO 3 Confirmation Reaction (s) Æ Ag(NH 3 ) 2 + + Cl - (aq) + 2 H + (aq) 2 NH 4 + + AgCl(s) Confirming Observation Æ white solid Pb 2+ (Group I) Separation Æ cold, dilute HCl Confirmation Æ saturated K 2 Cr 2 O 7 solution Confirmation Reaction (s) Æ Pb 2+ (aq) + CrO 4 2- (aq) PbCrO 4 (s) Confirming Observation Æ yellow solid
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Pb 2+ (Group II) Separation Æ HNO 3 , H 2 S Confirmation Æ saturated K 2 Cr 2 O 7 solution Confirmation Reaction (s) Æ Pb 2+ (aq) + CrO 4 - (aq) PbCrO 4 (s) Confirming Observation Æ yellow solid
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Bi 3+ (Group II) Separation Æ HNO 3 , H 2 S Confirmation Æ Stannite ion Æ Sn(OH) 3 - Confirmation Reaction (s) Æ Confirming Observation Æ imm. Jet black ppt 2 Bi(OH) 3 (s) + 3 Sn(OH) 3 - (aq) + 3 OH - (aq) Æ 3 Sn(OH) 6 2- (aq) + 2 Bi (s) Cu 2+ (Group II) Separation Æ HNO 3 , H 2 S Confirmation Æ K 4 [Fe(CN) 6 ] Confirmation Reaction (s) Æ Confirming Observation Æ brick red ppt 2 Cu 2+ (aq) + Fe(CN) 6 4- (aq) Cu 2 [Fe(CN) 6 ] (s)
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This note was uploaded on 04/29/2008 for the course CHEM 123 taught by Professor Larosa during the Spring '06 term at Ohio State.

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Lab 25_Help sheet edited - Ag+ Separation Confirmation...

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