Asam sulfit

Asam sulfit
Nama


Nama IUPAC Asam sulfit
Penanda
Nomor CAS	7782-99-2^Y
Model 3D (JSmol)	Gambar interaktif Tautomer: Gambar interaktif
3DMet	{{{3DMet}}}
ChEBI	CHEBI:48854^Y
ChEMBL	ChEMBL1161699^Y
ChemSpider	1069^Y
Nomor EC
KEGG	C00094^Y
PubChem CID	1100
Nomor RTECS	{{{value}}}
UNII	J1P7893F4J^Y
CompTox Dashboard (EPA)	DTXSID7042435
InChI InChI=1S/H2O3S/c1-4(2)3/h(H2,1,2,3)^Y Key: LSNNMFCWUKXFEE-UHFFFAOYSA-N^Y InChI=1/H2O3S/c1-4(2)3/h(H2,1,2,3) Key: LSNNMFCWUKXFEE-UHFFFAOYAJ
SMILES O[S+](O)[O-] Tautomer: [O-][SH+2](O)[O-]
Sifat
Rumus kimia	H₂SO₃
Massa molar	82.07 g/mol
Keasaman (pK_a)	1.857, 7.172
Basa konjugat	Bisulfit
Bahaya
Lembar data keselamatan	ICSC 0074
Klasifikasi UE (DSD) (usang)	C (C)
Frasa-R	R20, R34
Frasa-S	(S1/2), S9, S26, S36/37/39, S45
Titik nyala	Tak ternyalakan
Senyawa terkait
Senyawa terkait	Belerang dioksida Asam sulfat
Kecuali dinyatakan lain, data di atas berlaku pada suhu dan tekanan standar (25 °C [77 °F], 100 kPa).
Y verifikasi (apa ini ^YN ?)
Referensi

Asam sulfit adalah senyawa kimia dengan rumus kimia H₂SO₃. Tidak terdapat bukti apapun bahwa asam sulfit terdapat dalam bentuk larutan, tetapi molekul ini telah terdeteksi dalam fase gas.^[1] Konjugat basa dari asam ini adalah bisulfit dan sulfit.

Spektrum Raman larutan sulfur dioksida dalam air menunjukkan adanya signal hanya dikarenakan keberadaan molekul SO₂dan ion bisulfit, HSO₃⁻.^[2] Intensitas signal ini konsisten dengan kesetimbangan berikut:

SO₂ + H₂O → HSO₃⁻ + H⁺

K_a = 1,54×10⁻²; pK_a = 1,81.

Larutan akuatik sulfur dioksida, yang kadang-kadang dirujuk sebagai asam sulfit digunakan sebagai reduktor dan disinfektan. Larutan ini juga merupakan zat pemutih yang lunak, dan digunakan untuk bahan-bahan yang dapat rusak akibat pemutih yang mengandung klorin.

Referensi

^ D. Sülzle, M. Verhoeven, J. K. Terlouw, H. Schwarz (1988). "Generation and Characterization of Sulfurous Acid (H₂SO₃) and of Its Radical Cation as Stable Species in the Gas Phase". Angew. Chem. Int. Ed. Engl. 27: 1533–4. doi:10.1002/anie.198815331.
^ Templat:Jolly2nd

other

Sulfit
Asam sulfat
Bisulfit
Asam karbonat, asam hipotetis yang digunakan untuk mewakili gas karbon dioksida yang larut dalam air

Senyawa hidrogen

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