Sodium dichromate

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Revision as of 21:39, 2 December 2024 by Admin (talk | contribs) (Created page with "{{Compound|chemf=Na2Cr2O7|group=salts |mm=261.97|density=2.52|mp=356.7|bp=400(decomp)|sol_aq=730 |stp_p=crystals|stp_q=bright orange |nfpa_h=3|nfpa_o=ox }} ==Uses== {{Justify}} ===Other=== * Intermediate in chromium refining * oxidizing reagent ==Natural occurrence== ==Hazards== * potential (Chromium VI) carcinogen ==Production== ===Synthesis=== ====carbon dioxide==== Bubble carbon dioxide through an aqueous solution of sodium chromate : {{#Chem:2 Na2CrO4 +...")
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Sodium dichromate
Chemical formula Na2Cr2O7
OTP appearance bright orange crystals 
Molar Mass(g/mol) 261.97 
Density(g/cc) 2.52 
Melting Point(°C) 356.7 
Boiling Point(°C) 400(decomp) 
Solubility in water(g/L) 730
NFPA 704
NFPA704.png
0
3
0
ox

Uses

Justification Questioned

Other

  • Intermediate in chromium refining
  • oxidizing reagent

Natural occurrence

Hazards

  • potential (Chromium VI) carcinogen

Production

Synthesis

carbon dioxide

Bubble carbon dioxide through an aqueous solution of sodium chromate

2 Na2CrO4 + 2 CO2 + H2O → Na2Cr2O7 + 2 NaHCO3

sulfuric acid

Combine sulfuric acid and sodium chromate

Na2CrO4 + H2SO4 → Na2Cr2O7 + 2 NaHSO4

Testing

Purification

Storage

Disposal

See Also

References

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