Silver Compounds – Facts

Silver Compounds

Name/Formula Mass, g/mol MP°C BP°C Density Solubility g/100ml (°C)
Silver Acetate
AgCO2CH3
166.92 d 3.259 1.02(20) 2.52(80)
white solid – Determination of Ksp experiment
Silver Bromide
AgBr
187.78 158 >1026 6.437 8.4X10-6(20) .00037(100)
bromyrite, pale yellow solid – light sensitive chemical in photography
Silver Carbonate
Ag2CO3
275.75 d 218 6.077 .0032(20) .05(100)
yellow solid
Silver Chloride
AgCl
143.32 455 1550 5.56 .000089(10) .0021(100)
White powder, Reagent, Stan-Gray Glass, Silver Plating, Titrations
Silver Fluoride
AgF
126.87 435 1150 5.852 182(15.5) 205(108)
yellow solid, cubic
Silver Hydroxide
AgOH
124.87
tan precipitate – used in anions experiment
Silver Iodide
AgI
234.77 558 5.683 2.8X10-7(25) 2.5X10-6(80)
iodyrite, yellow hexagonal – photographic chemical
Silver Nitrate
AgNO3
169.87 212 d 444 4.352 122(0) 952(190)
Analytical Reagent, Mirrors, Swimming Pool biocide, Catalysts, Photography
Silver Oxide
Ag2O
231.74 230 7.143 .0013(20) .0053(80)
Silver Tarnish, Batteries, Catalysts, Biocide, Water Purification, Electronics
Silver Phosphate
Ag3PO4
418.58 849 6.37 2.8X10-18
Used in Photography
Silver Sulfate
Ag2SO4
311.80 652 1085 5.45 0.57(0) 1.41(100)
white, rhombahedral – used in anions experiment
Silver Sulfide
Ag2S
247.8 845 7.326 .00002
acanthite, gray/black, rhombahedral

Silver Reactions

Silver Reactions:
For each succeeding addition, a more stable silver compound or complex is formed:

  1. Start with 30 drops 0.1 M AgNO3 (1.70 g of AgNO3 in 100 ml water)
  2. Addition of a carbonate source leads to the formation of Silver Carbonate
    Add 1 drop 1 M NaHCO3 (8.4 g Sodium Bicarbonate (NaHCO3) in 100 ml water)
    2 Ag+ + HCO3 –> Ag2CO3 + H+
  3. Silver Phosphate is less soluble than Silver Carbonate:
    Add 5 drops 0.2 M Na3PO4 (3.3 g Sodium Phosphate (Na3PO4) in 100 ml water)
    3 Ag2CO3 + 2 PO43 –> 2 Ag3PO4 + 3 CO32
  4. Silver Hydroxide is less soluble than Silver Phosphate:
    Add 2 drops 1.0 M NaOH (33 mL 3 M Sodium Hydroxide (NaOH) in 100 ml water)
    Ag3PO4 + 3 OH –> 3 AgOH + PO43
  5. Silver Chloride is less soluble than Silver Hydroxide:
    Add 5 drops 1 M NaCl (5.844 g Sodium Chloride (NaCl) in 100 ml water)
    AgOH + Cl –> AgCl + OH
  6. Silver Chloride dissolves in ammonia:
    Add 25 drops 6.0 M NH3 (40.0 mL 15 M ammonia (NH3) in 100 ml water)
    AgCl + 2 NH3 –> Ag(NH3)2+ + Cl
  7. Silver Bromide forms from Silver Ammine:
    Add 5 drops 0.1 M KBr (1.19 g Potassium Bromide (KBr) in 100 ml water)
    Ag(NH3)2+ + Br –> AgBr + 2 NH3
  8. Addition of a source of thiosulfate ions allows the formation of the Silver(I) Thiosulfate complex.
    Add 4 drops 1.0 M Na2S2O3 (24.8 g Sodium Thiosulfate Pentahydrate (Na2S2O3ò5H2O) in 100 ml water)
    AgBr + 2 S2O32 –> Ag(S2O3)23 + Br
  9. Addition of an iodide source forms Silver Iodide.
    Add 2 drops 0.1 M KI (1.660 g Potassium Iodide (KI) in 100 ml water)
    Ag(S2O3)23 + I– –> AgI + 2 S2O32
  10. Addition of a sulfide source allows the formation of Silver Sulfide.
    Add 20 drops 0.1 M Na2S – (7.8 g Sodium Sulfide in 100 ml water)
    2 AgI + S2 –> Ag2S + 2 I

If any of the reagents are added out of sequence, the compounds and complexes missed will never be formed as the predominant species.

From: One Pot Silver Reactions

=== Dont make the following chemicals by mistake: ===

Even a tiny amount is extremely dangerous! THEY WILL SERIOUSLY INJURE YOU.
Fulminating Silver:
Ag2O.(NH3)2 (black crystals) obtained by dissolving silver oxide in aqua ammonia.
When dry it explodes violently on the slightest percussion.
Silver Fulminate:
Ag2C2N2O2 (white crystals) obtained by adding alcohol to a solution of silver nitrate.
When dry it is violently explosive.