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It's just a clerical error on the second floor! Potassium permanganate is reflected under heated conditions to generate manganese dioxide, potassium manganate and oxygen ! Then, potassium chlorate is heated and reacted under the condition of manganese dioxide as a catalyst to generate potassium chloride and oxygen, and there are two chemical equations (2kmNO4=== (heating) K2mNO4+MNO2+O2, 2KCLO3=== (heating, Mno2 as catalyst) 2KCl+3O2).
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First, KMno4 was heated to obtain K2, Mno4, Mno2 and O2, and KCLO3 was mixed with Mno2, and KCl and O2 were heated under the catalysis of Mno2
LS don't mistake people, it's not KMno4 (catalysis, but MNO2 catalysis.
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There are 2 chemical equations (2kmNO4=== (heating) K2mNO4+MNO2+O2, 2KCLO3=== (heating, MNO2 as a catalyst) 2KCl+3O2).
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2kmNO4===(heating) K2mNO4+MNO2+O2,2KCLO3=== (heating, mNO2 as catalyst) 2KCl+3O2)
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Potassium chlorate oxidizes iodine ions to elemental iodine, which is reduced to chloride ions at the same time.
You can try the specific trim yourself.
kclo3+6ki+3h2so4=3k2so4+3i2+kcl+3h2o
Remember. Potassium chlorate oxidizes iodine ions to elemental iodine, which is reduced to chloride ions at the same time. You can try the specific trim yourself.
kclo3,h2so4,ki
Potassium chlorate oxidizes iodine ions to elemental iodine, which is reduced to chloride ions at the same time. You can try the specific trim yourself.
Can you reflect that? Generating potassium sulfate and chloric acid?
Is it okay not to heat it?
naclo+2ki+h2so4=nacl+k2so4+i2+h2o
If you have any questions, you can click on the one after my name: Consult TA. I just want to be as timely as possible online.
ca(clo)2+4ki+2h2so4=caso4↓+k2so4+2kcl+2i2+2h2o
3h2so4+2fe(oh)3=fe2so43+6h2o
Upstairs there is no trim, and the pre-H2O coefficient is 6
Organic matter in concentrated sulfuric acid will be carbonized due to water loss, when the concentrated sulfuric acid into the sucrose dehydration experiment, there will be ** sexual odor, which indicates that the dehydrated carbon and concentrated sulfuric acid have reacted, that is, the equation is:
C+2H2SO4=CO2+2SO2+2H2O (remember with the ascending sign), this reaction is exothermic.
NH3 is an alkaline gas capable of reacting with acidic concentrated sulfuric acid.
NH3+H2SO4=NH4HSO4 Note: Concentrated H2SO4 cannot oxidize NH3!
It can only react with the thick, not the thin.
feo+h2so4=feso4+h2o
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Principle: Oxygen is produced with potassium permanganate or potassium chlorate, mainly using potassium permanganate to be unstable in the heating state, so as to decompose oxygen.
The reaction equation is as follows:
Potassium permanganate oxygen production steps: check-installation-setting-point-receiving-leaving-extinguishing.
Check --- check the airtightness of the device.
Schematic diagram of the experiment of oxygen production with potassium permanganate.
Schematic diagram of the experiment of oxygen production with potassium permanganate.
Fill --- medicines.
Fix the test tube to the iron frame ---.
Light --- alcohol lamp to heat (preheat first, note: always let the test tube be evenly heated first, otherwise the test tube will burst due to uneven heat and cold).
Collect the gas --- collect (you can use the drain method, the upward air exhaust method) and remove the catheter from the sink --- (if you use the dust upward air method, this step is basically not necessary, but it is best to remove the catheter and put the slide on the lid first).
Turn off --- alcohol lamp.
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will react. Because iodine ions are more reducible than ferric ions, iodide ions reduce ferric ions to ferric ions like 2.
Ion equation: 2i- +2fe3+ yields i2 + 2fe2+
Final products: potassium chloride, ferrous chloride and iodine.
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will react. Because i- is more reducible than Fe2+, i- will reduce Fe3+ to Fe2+.
Ionic equation: 2i- +2fe3+ == i2 + 2fe2+
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reaction, iodine and potassium chloride, ferrous chloride.
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The ionic equation branch of the anti-sliding repentance is officially as:
Acid-tolerant conditions, KMNO4 is the oxidizing agent, and KhSO3 is the reducing agent.
2mno4 - 5hso3 - h+ =5so4 2- +2mn2+ +3h2o
When alkaline conditions:
2mno4 - hso3 - 3oh- =so4 2- +2mno4 2- +2h2o
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Potassium chlorate is a colorless flake crystal or white granular powder, salty and cool, strong oxidant. Stable at room temperature, decompose and release oxygen above 400, and mix with reducing agents, organic matter, flammable substances such as sulfur, phosphorus or metal powder to form a ** mixture, which can occur when heated sharply. Therefore, potassium chlorate is a highly sensitive explosive, and sometimes even self-detonates when exposed to sunlight.
In case of concentrated sulfuric acid**. It can be used as a catalyst with manganese dioxide to react under heating conditions to produce oxygen. Composed of ions.
Do not use potassium chlorate to prepare chlorine gas, it is unsafe to make Cl2 by KCLO3, and the purity is also low [4], and the dark color is due to the oxide of chlorine (mainly ClO2).Chlorine dioxide is flammable and explosive, and it is very easy to cause accidents.
Potassium chlorate is a strong oxidizing agent. If a catalyst is present, it can decompose at a lower temperature and release oxygen strongly. It should be noted here that potassium chlorate is an exothermic reaction to liberate oxygen, 2kclo3=2kCl+3O2, and the reaction exothermic has a strong oxidizing effect in acidic solution.
When it is mixed with carbon, phosphorus and organic matter or combustible, it is easy to burn and **.
The chemical equation for the reaction with concentrated sulfuric acid is given below
kclo3+h2so4=khso4+hclo3
3HCO3 = HCO4 + 2ClO2 + H2O (chloric acid is unstable and will disproportionate to perchloric acid, chlorine dioxide and water).
2ClO2 = Cl2 + 2O2 (chlorine dioxide is also unstable and will decompose into chlorine and oxygen).
The total reaction equation: 3kclo3 + 3H2SO4 = 3kHpO4 + HCo4 + Cl2 +2O2 + H2O
The concentration of chloric acid, perchloric acid, and chlorine dioxide produced by this reaction is very high and very easy.
1.Chlorine gas is introduced into a hot potassium hydroxide solution.
6koh+3cl2==△kclo3+5kcl+3h2o
It cannot be oxidized. Hydrogen peroxide itself is unstable. Contact with metal ions. will decompose.
Civic good. The reason is that the brand is good, classic models for several years, and the market retention rate is high. It is recommended to consider Dongfeng Nissan's Sylphy or Beijing Hyundai's Yuedong.
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