Difference between revisions of "Sodium sulfite"

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Revision as of 20:04, 26 March 2020

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

Justification Questioned

Other

Natural occurrence

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

See Also

References