ANACHEM LEC: GROUP 1 CATIONS
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36 Terms
silver group
group I cation is also known as ___
group I cations
the first group represented from the unknown solution in the general cation analysis
6M HCl
group precipitant of group I cations
- high value
- bismuth
- antimony
during the precipitation of the silver group chlorides, the H⁺ ion concentration must be maintained at a relatively ___ to prevent the precipitation of the sparingly soluble oxychlorides of ___ and ___, provided the group II cation is also present in the unknown
heat w/boiling H₂O
what reagent is used?
white ppt. PbCl₂, Hg₂Cl₂/HgCl, AgCl → Pb²⁺, Hg₂²⁺, Ag⁺
6M HCl
what reagent separates Pb²⁺, Hg₂²⁺, Ag⁺?
precipitates into PbCl₂
what happens to Pb²⁺ after 6M HCl?
precipitates into Hg₂Cl₂
what happens to Hg²⁺ after 6M HCl?
precipitates into AgCl
what happens to Ag⁺ after 6M HCl?
hot H₂O
what reagent separates ppt. PbCl₂, Hg₂Cl₂, AgCl?
remains in sol'n as Pb²⁺
what happens to PbCl₂ after hot H₂O?
precipitates as Hg₂Cl₂
what happens to Hg₂Cl₂ after hot H₂O?
precipitates as AgCl
what happens to AgCl after hot H₂O?
- 6M HAc
- 1M K₂CrO₄
what reagent is used?
sol'n: Pb²⁺ → PbCrO₄
6M NaOH
what reagent is used?
PbCrO₄ → sol'n HPbO₂
6M HAc
what reagent is used?
sol'n HPbO₂ → ppt. PbCrO₄
6M NH₄OH through filter
what reagent separates ppt. Hg₂Cl₂, AgCl?
residues as Hg or Hg(NH₂)Cl
what happens to Hg₂Cl₂ after 6M NH₄OH through filter?
remains in sol'n as Ag(NH₃)²⁺ & Cl⁻
what happens to AgCl after 6M NH₄OH through filter?
0.1M KI
what reagent is used?
sol'n: Ag(NH₃)²⁺ & Cl⁻ → ppt. AgI
6M HNO₃
what reagent is used?
sol'n: Ag(NH₃)²⁺ & Cl⁻ → ppt. AgCl
yellow
color of PbCrO₄
yellow
color of Hg residue
white
color of Hg(NH₂)Cl
yellow
color of AgI
white
color of AgCl
lead chloride
chemical name of PbCl₂
mercury (I) album
chemical name of Hg₂Cl₂
silver chloride
chemical name of AgCl
lead (II) chromate
chemical name of PbCrO₄
amino mercuric chloride or ammonobasic mercuric chloride
chemical name of Hg(NH₂)Cl
silver iodide
chemical name of AgI
AgI↓ + 2NH₃
Ag(NH₃)₂⁺ + I⁻ → _____
AgCl↓ + 2NH₄⁺
Ag(NH₃)₂⁺ + Cl⁻ + 2H⁺ → ______
PbCrO₄↓ + 3Ac + 2H₂O
HPbO₂ + CrO₄²⁻ + 3HAc → ______
Hg°₍ᵢ₎ + Hg(NH₂)Cl₍ₛ₎ + NH₄⁺ + Cl⁻
Hg₂Cl₂ + 2NH₃ → _____
Note 
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