Sodium sulfite: Difference between revisions

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(Created page with "{{Compound|chemf=Na2SO3|group=salts |mm=126.043|density=2.633(anh)|mp=500|bp=decomp|sol_aq=270 |stp_p=solid|stp_q=white|nfpa_h=1 }} ==Uses== {{Justify}} ===Other=== * Feedstoc...")
 
 
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==Natural occurrence==
==Natural occurrence==
* Does '''not''' occur naturally
==Hazards==
==Hazards==
==Production==
==Production==
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: {{#Chem: 2NaHSO3 + Ca(OH)2 = CaSO3 + Na2SO3 + H2O }}
: {{#Chem: 2NaHSO3 + Ca(OH)2 = CaSO3 + Na2SO3 + H2O }}


==Purification==
==Testing==
==Storage==
==Disposal==
==See Also==
==See Also==
* [[sodium bisulfite]]
* [[sodium bisulfite]]

Latest revision as of 21:41, 26 March 2020

 
Sodium sulfite
Chemical formula Na2SO3
OTP appearance white solid 
Molar Mass(g/mol) 126.043 
Density(g/cc) 2.633(anh) 
Melting Point(°C) 500 
Boiling Point(°C) decomp 
Solubility in water(g/L) 270
NFPA 704
NFPA704.png
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1
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Uses

Justification Questioned

Other

Natural occurrence

  • Does not occur naturally

Hazards

Production

Synthesis

via sulfur dioxide

Bubble sulfur dioxide through a saturated solution of sodium hydroxide, producing sodium sulfite

2 NaOH + SO2 Na2SO3 + H2O

via sodium bisulfite 1

Combine sodium bisulfite with a stochiometric amount of additional sodium carbonate

2 NaHSO3(aq) + Na2CO3(aq) 2 Na2SO3(aq) + H2O(l) + CO2(g)

via sodium bisulfite 2

Combine sodium bisulfite with calcium hydroxide, producing calcium sulfite and sodium sulfite along with water

2 NaHSO3 + Ca(OH)2 CaSO3 + Na2SO3 + H2O

Purification

Testing

Storage

Disposal

See Also

References