Potassium permanganate, sulfuric acid, carbon reaction principle and equation

We know that both concentrated sulfuric acid and potassium permanganate have strong oxidizing properties, and if potassium permanganate powder is added to a small amount of concentrated sulfuric acid, it shows stronger oxidation and can directly ignite some flammable substances, such as lit alcohol lamps. How does it work? What is the reaction that occurs between potassium permanganate and concentrated sulfuric acid?

When potassium permanganate and concentrated sulfuric acid are in contact, dark green oily Mn2O7 is generated, it is a very strong oxidant, unstable at room temperature, can quickly decompose to produce oxygen, when it comes into contact with ethanol, due to the occurrence of redox reaction, the heat generated is enough to make ethanol burn, therefore, the alcohol lamp is ignited, but this experiment has a certain danger (avoid too much medicine, avoid the glass rod stained with ethanol to contact Mn2O7 again. Two days ago, I saw a school party on the Internet, and when a student was performing for the show, it happened**!

Finally, it's redox reactions.

As for the equation, there must be one in the textbook of high school, and the landlord may wish to take a look, and the trimming is a little difficult.

4 kmno4+10 h2so4+7 c==4 mnso4+2 k2so4+7 co2+4 so2+10 h2o

The phenyl group can be left alone, as if they are not priced, only look at the methyl group and carboxyl group, so as to avoid the trouble of calculation, C increases the valence of 6(+3-(-3)), and Mn changes the valence of 5, so 5C6H5-CH3+6KMNO4

5C6H5-Cooh+6MnSO4, K is conserved, so 3K2SO4, then sulfate is conserved, so 9H2SO4, then H is conserved 5*3+2*9=5*1+2*N(H2O), so 14H2O, then check O, and the trim is completed.

1) Potassium permanganate.

Potassium manganate, manganese dioxide and oxygen can be generated by decomposition under the condition of heating and rotting, so potassium permanganate can be used to produce oxygen in the laboratory, and the chemical equation is 2kmno 4 k 2 mno 4 +mno 2 +o 2 2) carbon dioxide in the mountain zone.

It reacts with lime water to form calcium carbonate.

and water, the chemical equation is CO2 +Ca(OH) 2 CaCO3 +H2 0 (3) Aluminum hydroxide reacts with gastric acid (hydrochloric acid) to produce aluminum chloride.

and water, the chemical equation is Al(OH)3 +3HCl=ALCL3 +3H2O(4)Baking soda.

It is decomposed by heat to form sodium carbonate.

Water and carbon dioxide, the chemical equation is 2NaHCO3 NA2 CO3 +H2 O+CO2 So the answer is: (1)2kmNO4 K2 2 MNO 4 +MNO 2 +O 2 2)CO2 +Ca(OH) 2 Hungry CACo 3 +H 2 0 (3)Al(OH) 3 +3HCl=ALCL 3 +3H2 O (4)2NaHCO3 NA2 CO3 +H2 O+CO2

mnso4+2nahco3=mn（hco3）2+na2so4。The reaction equation of manganese sulfate and sodium bicarbonate is mnSO4 + 2NaHCO3 = mn(HCO3)2 + Na2SO4, and the manganese ions reacted with manganese sulfate and sodium bicarbonate can be combined with the carbonate ionized by the group chong hood Qing HCO3 to form a white manganese carbonate precipitate.

The reaction of acidic potassium permanganate with olefins can add an oxygen to the carbon at the end of the double bond and two fissures of the olefin: c c c o c If there is a hydrogen on a carbon, it can be seen that the resulting oxidation product contains aldehydes, and because aldehydes have strong reducing properties, acidic potassium permanganate can continue to oxidize them to carboxylic acids:

Cho cooh, if there is a carbon with two hydrogens on it, it can be seen that the carbon is oxidized to formaldehyde, which will be further oxidized to carbonic acid, which in turn decomposes into carbon dioxide and water. Therefore, ethylene is oxidized to carbon dioxide by the intrinsic potassium permanganate.

The acidic potassium permanganate itself is reduced to divalent manganese ions, and it can be seen from the reaction that the carbon-carbon double bond has been completely broken.

1) Carbon and carbon dioxide.

At high temperatures, the reaction is carried out to form bright carbon monoxide.

The chemical equation of the reaction is: C+CO2 high temperature 2co；This reaction conforms to the characteristics of "multiple one" and belongs to the chemical reaction (2) potassium permanganate.

Potassium manganate and manganese dioxide are generated under heating conditions.

and oxygen, the chemical equation for the reaction is 2kmNO4K2MNo4+MNO2+O2; The reaction conforms to the characteristics of "one becomes many" and belongs to the decomposition reaction (3) Detection of carbon dioxide gas with clarified lime water, carbon dioxide and calcium hydroxide.

The reaction produces calcium carbonate.

The chemical equation for the reaction of precipitation and water is: CO2 +Ca(OH) 2 =CaCo3 +H2O, so the answer is: (1)C+CO2 High temperature

2co；chemical reactions; （2）2kmno 4 △ k 2 mno 4 +mno 2 +o 2 ↑；decomposition reactions; （3）ca（oh） 2 +co 2 =caco 3 ↓+h 2 o．

It does not react, because, first of all, the valency of carbon in carbon dioxide is already the most important and can no longer be oxidized, and the oxidation strength of potassium permanganate cannot reach the ability to oxidize oxygen....So you can't react.

The organic matter that fades the acidic potassium permanganate solution is:

1) unsaturated hydrocarbons; For example, hydrocarbons that contain carbon-carbon double bonds or carbon-carbon triple bonds.

2) homologues of benzene; Toluene, xylene, ethylbenzene, etc.

3) derivatives of unsaturated hydrocarbons; Some halogenated hydrocarbons containing carbon-carbon double bonds or carbon-carbon triple bonds.

4) some alcoholic organic compounds; For example, propylene alcohol.

5) Organic matter containing aldehyde groups: aldehyde, formic acid, formate, formate;

6) Petroleum products (pyrolysis gas, cracked gas, cracked oil);

7) Natural rubber.

Chemical Reaction Equation:

3k₂mno₄ +4co₂ +2h₂o= 2kmno₄ +mno₂↓ 4khco₃

The essence is that CO is soluble in water, which enhances the acidity of the solution, and causes the disproportionation reaction of K MNO to generate KMNO, MNO, and KhCo.

The essence is that CO2 is dissolved in water, which makes the solution more acidic, and causes K2mnO4 to undergo disproportionation reaction to generate KMNO4 and Mno2.

3mno4 2- +4co2 + 2h2o ==== 2mno4- +mno2↓ +4hco3-

3k2mno4 + 4co2 + 2h2o ==== 2kmno4 + mno2↓ +4khco3

CO2 excess 3K2Mno4 + 4CO2 + 2H2O ==== 2kmNO4 + Mno2 + 4KHCO3

Carbon dioxide is less than 2CO2 + 3K2mNO4 = 2kmNO4 + MNO2 + 2K2CO3