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Reaksi Kation

The document provides reactions to identify cations from groups 1 and 2. It lists the reactions that occur between common reagents (e.g. HCl, NaOH, NH4OH) and the cations Ag+, Pb2+, Hg22+, Bi3+, Cu2+, and Cd, showing the products formed.

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Annisa Amalia
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141 views9 pages

Reaksi Kation

The document provides reactions to identify cations from groups 1 and 2. It lists the reactions that occur between common reagents (e.g. HCl, NaOH, NH4OH) and the cations Ag+, Pb2+, Hg22+, Bi3+, Cu2+, and Cd, showing the products formed.

Uploaded by

Annisa Amalia
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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1.

Buatlah tabel reaksi identifikasi kation untuksetiap golongan sesuai dengan pereaksi
pereaksi yang digunakan pada tabel dibawah ini (lihat diktat kimia dasar dan buku Vogel
kualitatif)
2. Tulis semua reaksi yang terjadi antara pereaksi – pereaksi yang digunakan dan kation
– kationnya

Kation Golonga I
Ag+
1) HCL + Ag+ → AgCl ↓ + Cl-

2) NaOH + Ag+ → AgOH ↓ + Cl-


AgOH↓ + NaOH ↛
3) NH4OH + Ag+ → AgOH↓ + NH4+
AgOH↓ + NH4OH → [Ag(OH)2]- + NH4+
4) KI + Ag+ → AgI ↓+ K+
AgI↓ + KI ↛
5) K2Cr O4 + 2 Ag+ → Ag2CrO4 + 2K+
Ag2CrO4 ↓ + NH4OH
Ag2CrO4 ↓ + HCL → AgCl ↓ + H2CrO4
6) H2SO4 + 2Ag+ → Ag2SO4 + 2H+

Pb2+
1) 2HCL + Pb2+ → PbCl2 ↓ + 2H+

2) 2NaOH + Pb2+ → Pb(OH)2 ↓ + 2Na+


Pb(OH)2 ↓ + NaOH → Na+ + [Pb(OH)3]+
3) NH4OH + Pb2+ → Pb(OH)2 ↓ + NH4+
Pb(OH)2 ↓ + NH4OH ↛
4) 2KI + Pb2+ → PbI2 ↓ + 2K+
Pb I2 ↓ + KI ↛
5) K2CrO4 + Pb2+ → PbCrO4 ↓ + 2K+
PbCrO4 ↓ + NH4OH
PbCrO4 ↓ + HCL
6) H2SO4 + Pb2+ → PbSO4 ↓ + 2H+

Hg22+
1) 2HCL + Hg22+ → HgCL2 ↓ + 2H+

2) 2NaOH + Hg22+ → Hg2(OH)2 ↓ + 2Na+


Hg2(OH)2 ↓ + NaOH ↛
3) 2NH4OH + Hg22+ → Hg2(OH)2 ↓ + 2NH4+
Hg2(OH)2 ↓ + NH4OH
4) 2KI + Hg22+ → Hg2I2 ↓ + 2NH4+
Hg2I2 ↓+ KI → [Hg2I4]- + K+
5) K2CrO4 + Hg22+ → Hg2CrO4 ↓ + 2K+
Hg2CrO4 ↓ + 2NH4OH → (NH4)2CrO4 ↓ + Hg2(OH)2
Hg2CrO4 ↓ + HCL →
H2SO4 + Hg22+ →

KATION GOLONGAN II

BI3+

1) NaOH

Bi3+ + 3NaOH → Bi(OH)3 + 3Na+

2) NH4OH

Bi3+ + 3NH4OH → Bi(OH)3 + 3NH4+

3) KI

Bi3+ + 3KI = Bi I3 + 3K+

4) Na2S

Bi3+ + 3Na2S → BiS3 + 3Na2+


Cu2+

1) NaOH

Cu2+ + 2NaOH → Cu(OH)2 ↓ + 2Na+

2) Cu(OH)2 + NaOH → Na[Cu(OH)3]

3) NH4OH

Cu2+ + 2NH4OH → Cu(OH)2 ↓ + 2NH4+

Cu(OH)2 + NH4OH → NH4[Cu(OH)3]

4) KI

Cu2+ + 2KI → Cu I2 ↓ + 2K+

Cu I2 + KI → K(Cu I2)

Cd

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