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Anonymous users2024-02-07There are a few ways to try:
Sulphur dioxide can be produced under the condition of sulphur combustion:
s（s） +
g) = ignition = <>
g) Hydrogen sulfide can be burned to produce sulfur dioxide:
g） +3 <>
g) = ignition = 2 <>
g） +2 <>
g) Heating pyrite, sphalerite, mercury sulfide, can produce sulfur dioxide:
4fes2（s） +11o2（g） =2fe2o3（s） +8so2（g）
2zns（s） +3o2（g） =2zno（s） +2so2（g）hgs（s） +o2（g） =hg（l） +so2（g）<>
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Anonymous users2024-02-06(1) Acid oxides:
SO2 H2O = Reversible = H2SO3
so2 + ca(oh)2 ＝ caso3 + h2o
so2+2naoh = na2so3+ h2o
SO2 (excess) + NaOH = NaHSO3
so2+na2so3+h2o==2nahso3
2) Reductiveness:
so2+cl2+2h2o=2hcl+h2so4
so2＋br2 + 2h2o＝h2so4+2hbr
2SO2 + O2 = reversible (HPHT catalyst) = 2SO3
so2+h2o2==h2so4
so2+2fe3+ +2h2o==2fe2++so42-+4h+
5so2＋2kmno4＋2h2o＝2h2so4＋k2so4＋2mnso4
3) Oxidation:
so2＋2h2s=3s↓＋2h2o
4) Other Applications:
Laboratory-prepared SO2: Na2SO3 + H2SO4 (concentrated) Na2SO4 + H2O + SO2
Exposure to sulfuric acid:
4Fes2 + 11O2 = High temperature = 2Fe2O3 + 8SO2
2SO2 + O2 = reversible (HPHT catalyst) = 2SO3
so3 + h2o ＝ h2so4
Coal-fired flue gas desulfurization.
Limestone Gypsum method:
caCO3 = high temperature = cao + CO2 ; cao + so2 ＝ caso3
so2 + ca(oh)2 ＝ caso3 + h2o 2caso3 + o2 ＝ 2caso4
Ammonia desulfurization method:
so2 +2 nh3＋h2o==(nh4)2so3；so2 + nh3＋h2o==nh4hso3
2(nh4)2so3+ o2==2(nh4)2so4
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Anonymous users2024-02-05Huaxun Li Yexue equation mu shouting:
2h2s + so2=3s+2h2o
The distraction shouting sub-equation of the reaction in water is: H2++(SO3)2-+2H2S=3S+3H2O
The ion equation that is not in water: 2H2S + SO2 = 3S + 2H2O
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Anonymous users2024-02-04s+o2==ignition==so2
2H2S+3O2==Dotted Bucket Random Burning==2H2O+2So22So2+O22Khso4+2mnSo4+H2
SO2 + NAOH (a small amount) = NaHSO3
SO2+2NAOH (mass) = NA2SO3+2H2ONa2SO3+ HCl (small amount) = NAHs+NAClNa2SO3+ 2HCl (large hood sales) = 2NACl+ SO2 +H2O
2Na2SO3 + H2SO4 = 2NaHSO3 + Na2SO4
Na2SO3 + H2SO4 (mass) = Na2SO4 + SO2 + H2
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Anonymous users2024-02-03There are 3 main methods.
The equation reflecting the strong oxidizing properties of concentrated sulfuric acid is generated by SO2.
Cu+2H2SO4 (concentrated) = CuSO4+H2O+SO2 ZN+2H2SO4 (concentrated) = ZNSO4+H2O+SO2 2Fe + 6H2SO4 (concentrated) = Fe2(SO4)3+ 3H2O + 3SO2
Embody strong acid to weak acid.
Na2SO3 + 2HCl = NaCl + SO2 + H2O (laboratory method).
Na2SO3 + H2SO4 = Na2SO4 + SO2 + H2O (laboratory method).
Ba2SO3 + H2SO4 = Ba2SO4 +SO2 +H2O embodies the reduction of sulfur.
s + o2 = so2
There are many ways to test this.
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Sulfur dioxide. Bonding properties of molecules.
1. Bonding characteristics The sulfur dioxide molecule is an angular molecule, and its structure has been measured from the crystal and vapor state: bond length ( bond angle ( as shown in Figure (. At present, there are two representative views on the bonding properties of molecules: >>>More
You need to understand that different food testing items are different. First of all, this is determined by the different food production and processing technology, the use of sulfur fumigation, the addition of sulfite is used for bleaching and preservative. For example, yuba, daylily, flower tea, canned enoki mushrooms, wolfberry, white melon seeds, preserved fruit preserves, red wine, etc., these foods are easy to use sulfur dioxide additives in order to look good in color and shelf life, and in addition, the "Hygienic Standard for the Use of Food Additives" (GB2760-2007) stipulates that sulfites can be added or sulfur fumigation is used, and the detection indicators are sulfur dioxide residues. >>>More
This has a great impact on the human body, which will cause damage to the body, and it will also cause some diseases.
Sulfur dioxide is introduced into the purple litmus solution: the solution turns red. >>>More