Can potassium iodate react with potassium iodide?

A redox reaction can occur under acidic conditions and the equation is:

Oxidation-reduction reaction is a type of reaction in which the oxidation number of an element changes before and after a chemical reaction. The essence of a redox reaction is the gain or loss of electrons or the shift of shared electron pairs. Redox reaction is one of the three basic reactions in chemical reactions (the other two are (Lewis) acid-base reaction and free radical reaction).

Combustion, respiration, photosynthesis, chemical batteries in production and life, metal smelting, rocket launches, etc. are all closely related to redox reactions in nature. The study of redox reactions is of great significance to the progress of mankind.

Before and after the redox reaction, the oxidation number of the element changes. Depending on the increase or decrease in the oxidation number, the redox reaction can be split into two half reactions: the half reaction with the increased oxidation number is called the oxidation reaction; The reaction with a decrease in oxidation number is called a reduction reaction.

Oxidation and reduction reactions are interdependent and cannot exist independently, and together they constitute redox reactions.

In the reaction, the substances that undergo oxidation reactions, called reducing agents, produce oxidation products; A substance that undergoes a reduction reaction, called an oxidant, produces a reduction product. Oxidation products are oxidizing but weaker than oxidants; The reducing product is reducing, but weaker than the reducing agent.

Whether a chemical reaction is a redox reaction can be judged according to whether the reaction has an increase in oxidation number, or whether there is electron gain, loss and transfer.

The determination of redox reactions in organic chemistry is usually based on whether the oxidation number of carbon changes: if the oxidation number of carbon increases, the reaction is an oxidation reaction; When the oxidation number of carbon decreases, this reaction is a reduction reaction. Since in the vast majority of organic matter, hydrogen always presents a positive valence state, and oxygen always presents a negative valence state, so the reaction of organic matter to obtain hydrogen and lose oxygen is generally called reduction reaction, and the reaction of oxygen loss and hydrogen loss is called oxidation reaction.

1. Strength and weakness law: oxidation: oxidant oxidation product; Reducibility: Reducing agent" reducing product.

2. Valence law: the element is in the most advanced state and only has oxidation; The element is in the lowest valence state and is only reductive; It is in the intermediate valence state, which is both oxidizing and reducing.

3. Transformation law: when the centering reaction occurs between different valence states of the same element, the oxidation number of the element is only close but not crossed, and the maximum value of the same element reaches the same valence state.

4. Priority law: For the same oxidant, when there are multiple reducing agents, it usually reacts with the most reducible reducing agent first.

5. Conservation law: The number of electrons obtained by the oxidant is equal to the number of electrons lost by the reducing agent.

OK. Elemental iodine is produced.

Must be reflected in an acid solution.

To provide hydrogen ions.

The iodine +5 valence of potassium iodate and the iodine-1 valence of potassium iodide undergo a centering reaction in an acidic solution to generate iodine element.

Under acidic conditions, a redox reaction occurs to produce iodine.

All of the above are correct. The reaction formula is as follows (y takes hydrochloric acid as an example):

kio3+5ki+6hcl=3i2+6kcl+3h2o

Under acidic conditions, iodine is formed in the center.

Potassium chlorate and potassium iodide react acidically when dissolved in water, and the locally rolling hydrogen ions produced make the solution acidic. This is because potassium chlorate and potassium iodide are weak bases and weak acids, and their hydrolysis reactions produce a small amount of hydrogen ions (H+) and hydroxide ions (oh-), and the concentration of hydrogen ions is greater than that of hydroxide and oxygen band ions, resulting in an acidic solution.

The reaction equation is as follows:

KCLO3 + H2O K+ +ClO3- +H+Ki + H2O K+ +I- +H+ Therefore, potassium chlorate tung ta and potassium iodide react acidically when dissolved in water.

The reaction of potassium iodate and potassium iodide under different conditions is as follows:

1.Acidic conditions: In the presence of strong acids, both potassium iodate and potassium iodide can be reduced to iodine, and the reaction speed is faster under the catalysis of ferric chloride or ferric sulfate. Among them, potassium iodide reacts faster than potassium iodate.

2.Alkaline conditions: Under strong alkaline conditions, potassium iodate and potassium iodide can be reduced to iodine cherry. But potassium iodate reacts much more slowly than potassium iodide and produces less iodine.

3.Neutral conditions: Under neutral conditions, both potassium iodate and potassium iodide are difficult to reduce to iodine.

Overall, potassium iodide is more easily reduced to iodine than potassium iodate under both acidic and alkaline conditions. However, under neutral conditions, neither is easily reduced by the collapse cluster. Therefore, the specific reaction conditions need to be determined according to the actual situation.

The composition of the two is different. The latter is a mixture of starch and potassium iodide; The former is a starch solution, and the two solutions do not turn blue when encountering starch, but when encountering iodine element, the former can oxidize potassium iodide to iodine element, and make the solution blue, while the latter does not have this property.

Iodine flower potassium starch solution (acidified with sulfuric acid), drop a small amount of sodium hypochlorite solution, you will immediately see that the solution turns blue, the hypochlorite in the sodium hypochlorite solution has oxidizing properties, and the iodine ions in the iodine flower potassium starch solution (acidified with sulfuric acid) are reducible, both reflect the formation of iodine element, and the starch turns blue.

Basic information of starch potassium iodide test strips.

Starch potassium iodide test strips will only work if the oxidation of the substance to be measured is greater than that of iodine element. Such as: hydrogen peroxide, sodium hypochlorite, chlorine, nitrite ...

Wait a minute. Iodine can be displaced, which can be replaced from potassium iodide, and it reacts with starch to give it a blue color. It should not be used in an environment where the temperature exceeds 40, as the iodine starch mixture can decompose in this environment and the blue color will disappear.

Reaction equation: i2+ki=ki3

In the process of preparing iodine water, potassium iodide can increase its solubility in water, this reaction is a reversible equilibrium reaction, and iodine can also be released.

(ch₃coo)₂pb + 2ki == pbi₂↓+2ch₃cook

It is obtained by the reaction of lead oxide with acetic acid. The lead oxide is dissolved in 80% hot acetic acid until the bubble is harmonized, filtered, a small amount of acetic acid is added to the filtrate, and evaporated to a relative density. Cooling, filtration, and drying to obtain lead acetate.

The purity of industrial lead acetate can reach more than 98%. After purification, it can be recrystallized with 1% acetic acid solution, or lead acetate trihydrate is dissolved in water and hydrogen sulfide is introduced to precipitate lead sulfide and other impurities together, and fluorescent gallium reagent (complexing agent of CO, AL, CU, etc.) is added to the filtrate after filtration, a small amount of activated carbon is added, and EDTA sodium salt is added to obtain extremely pure reagent-grade products.

(CH3COO)2PB+2KI== PBI2+2CH3COOKWhat excess, PBI2 continues to dissolve by generating PBI4(2-)ligand: (CH3COO)2PB2PB+4Ki== K2PBI4 + 2CH3COOK

Chemical Equation:

kio +5ki+3h so =3k so4+3i +3h o (add acid).

Reaction phenomenon: there is no change after mixing, and the solution turns brown after adding acid.

Potassium iodide is often used as a steel pickling corrosion inhibitor or as a synergist for other corrosion inhibitors. Potassium iodide is a raw material for the preparation of iodide and dyes. It is used as a photosensitive emulsifier in the photographic industry, and is also used as a pharmaceutical and food additive.

There is no change after mixing, and the solution turns brown after adding acid. 5i- io3- 6h =3h2o 3i2.After adding alkali to alkaline, the solution becomes colorless again, 3i2 6oh-=io3- 5i- 3h2o