Why sodium sulfide with dilute sulfuric acid is not a redox reaction

Because the oxidation of dilute sulfuric acid is reflected by H ions, hexavalent sulfur does not have oxidizing properties, so there will be no centering reaction!

Dilute sulfuric acid does not have strong oxidizing properties, so the reaction with Na2S is only a metathesis reaction of strong acids to weak acids.

Na2S + H2SO4==H2S + Na2SO4 If it reacts with concentrated sulfuric acid, it is a redox reaction, and the equation is as follows.

Na2S + 2H2SO4 (concentrated) ===S + SO2 + Na2SO4 + 2H2O

Because hydrogen sulfide and sodium sulfate are generated, any atom involved in the reaction, the valence state does not change, so it is not considered a redox reaction.

The solubility product (or solubility) of copper sulfide is much smaller than that of copper hydroxide, and the concentration of copper ions dissociated in the copper tetraammonia with ion solution can fully meet the needs of forming copper sulfide precipitation, but cannot meet the concentration requirements of forming copper hydroxide precipitation.

nas+h2so4=naso4+h2s

There is no electron transfer so it is not redox.

The oxidation reaction is to see if the electrons have changed, and if the electrons of the participating elements have changed, it is an oxidation reaction.

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Reaction equation of sodium sulfide and concentrated sulfuric acid: if it is dilute sulfuric acid, there is no oxidation, and the reaction of strong acid to weak acid occurs: Na2S + H2SO4 = Na2SO4 + H2S.

If it is concentrated sulfuric acid, strong oxidation, redox reaction occurs: Na2S + H2SO4 (concentrated) = S + Na2SO3 + H2OH2S, the gas cannot be dried with concentrated sulfuric acid for fear of being oxidized.

Reaction phenomenon of sodium sulfide and concentrated sulfuric acid:

Because concentrated sulfuric acid has strong oxidation and sodium sulfide has reducibility, the two undergo redox reaction: Na2S + H2SO4 (concentrated) = S + Na2SO3 + H2O At the beginning (before adding sulfuric acid), the HS- in the solution is completely generated by S2- hydrolysis, and the concentration is low.

After the addition of sulfuric acid, the H+ of sulfuric acid is combined with S2- to form HS-, and its concentration continues to increase. When the ratio of the amount of sulfuric acid to the sodium sulfide substance is 1:2, the HS- concentration reaches its maximum.

If sulfuric acid is added, the sulfuric acid begins to combine with Hs- to form H2S and escape the solution, and the Hs- concentration begins to decrease again.

The above content reference: Encyclopedia - sodium sulfide.

Sodium sulfide reacts with concentrated sulfuric acid to form sulfur element, sulfur dioxide and sodium sulfate.

Na2S + 2H2SO4 (concentrated) ===S + SO2 + Na2SO4 + 2H2O

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The reaction between sodium sulfide and concentrated sulfuric acid is: Na2S + 2H2SO4 (concentrated) Na2SO4 + SO2 +S +2H2O, and sodium sulfide reacts with concentrated sulfuric acid to form S and SO2。Sodium sulfide is an inorganic compound, a colorless crystalline powder, strong moisture absorption, soluble in water, and strong alkaline in aqueous solution.

The chemical formula of sodium sulfide is Na2S, which is a colorless crystalline powdered inorganic salt in the form of Na2S ·9H2O hydrate. Sodium sulfide is also known as odorous alkali, odorous soda, flavonoid, and sulfide alkali. When left in the air, sodium sulfide emits toxic hydrogen sulfide gas that smells like rotten eggs.

Sodium sulfide has strong moisture absorption and is easily soluble in water.

Characteristics of the properties of sodium sulfide

At room temperature, pure products are colorless or slightly purple prismatic crystals, and industrial products are often pink, brown-red, and earthy yellow blocks due to impurities. It has a foul smell. Soluble in cold water, very soluble in hot water, slightly soluble in alcohol.

Industrial products are generally mixtures of different forms of crystal water, and contain different degrees of impurities, in addition to different appearance and color, density, melting point, boiling point, etc. are also different due to the influence of impurities.

Hydrogen sulfide occurs by decomposition in acid. It is deliquescent in the air, and at the same time the oxidation gradually occurs, and hydrogen sulfide is formed in case of acid. Impact, high heat can explode. In case of acid, toxic hydrogen sulfide gas is produced, anhydrous sulfide alkali is flammable, and toxic sulfur oxide fumes are emitted by heating.

The above content reference: Encyclopedia - sodium sulfide.

The above content reference: Encyclopedia - concentrated sulfuric acid.

Sodium oxide reacts with dilute sulfuric acid to form sodium sulfate and water, and the general formula: oxide and acid reaction are both to produce salt and water.

The chemical equation for the reaction of sodium oxide with dilute sulfuric acid is:

na2o+h2so4=na2so4+h2o

There are 2 equations for the reaction of sulfuric acid with sodium hydroxide, namely:

The reaction when H2SO4 is 1:2 with NaOH: H2SO4 2NaOH Na2SO4 2H2O

The reaction when H2SO4 is 1:1 with NaOH: H2SO4 NaOH NaHSO4 H2O

There are two steps: sodium oxide is first combined with water to form sodium hydroxide, and then sodium hydroxide reacts with dilute sulfuric acid.

In the first step, the activity of sodium oxide is very high, and the proportion of water in dilute sulfuric acid is very high, so most of the sodium oxide thrown into dilute sulfuric acid is first reacted with water molecules to generate sodium hydroxide.

na2o+h2o=2naoh

In the second step, sodium hydroxide reacts with dilute sulfuric acid.

NaOH + H2SO4 = NaHSO4 + H2O If there is still sodium hydroxide at this time that the reaction is not complete, it will react further.

nahso4+naoh=na2so4+h2o

Summary. Hello dear, sodium thiosulfate is a strong reducing agent that can be oxidized into sulfate by oxidizing agents. Different oxidants have different effects on the reduction products of sodium thiosulfate.

If a more acidic oxidant is used, such as nitric acid, sulfuric acid, etc., sodium thiosulfate will be completely oxidized to sulfate. In this case, the reduction product is sulfate, which has a larger molar mass and a darker color. If less acidic oxidants are used, such as chlorine, iodide, etc., sodium thiosulfate will only be partially oxidized to sulfate.

In this case, the reduction product is thiosulfate, which has a smaller molar mass and a lighter color. Overall, different oxidants have different effects on the reduction products of sodium thiosulfate. When selecting an oxidant, it needs to be selected on a case-by-case basis to ensure that the quality and quantity of the reduction product meet the requirements.

Effect of the strength of the oxidant reacting with sodium thiosulfate on its reduction products.

Hello dear, sodium thiosulfate is a strong reducing agent that can be oxidized into sulfate by oxidizing agents. Different oxidants have different effects on the reduction products of sodium thiosulfate. If a more acidic oxidant is used, such as nitric acid, sulfuric acid, etc., sodium thiosulfate will be completely oxidized to sulfate.

In this case, the reducing product is sulfate, which has a large molar mass and a darker color. If less acidic oxidants are used, such as chlorine, iodide, etc., sodium thiosulfate will only be partially oxidized to sulfate. In this case, the reduction product is thiosulfate, which has a smaller molar mass and a lighter color.

Overall, different oxidants have different effects on the reduction products of sodium thiosulfate. When selecting an oxidant, it needs to be selected on a case-by-case basis to ensure that the quality and quantity of the reduction product meet the requirements.

Chemical reaction of sodium hydroxide with dilute sulfuric acid: 2NaOH + H2SO4 = Na2SO4 + 2H2O;

As can be seen from the products, there is no obvious phenomenon of slow talk.

Since this reaction is a neutralization reaction, and the neutralization reaction is an exothermic reaction, the outer wall of the container where sodium hydroxide reacts with dilute sulfuric acid will be hot.

Neutralization reaction: Acids and bases exchange components with each other to form a scrambled reaction of salt and water.

Sodium peroxide and dilute sulfuric acid react to generate sodium sulfate clear, oxygen and dry water

2na2o2 + 2h2so4

2na2so4 + o2 + 2h2o

The chemical equation for the reaction of sodium and sulfur is: 2Na+S = heated Na2S.

Sodium (Natrium) is a metal element, the element symbol is NA, and the English name is closed excitation sodium. In the periodic table, it is located in the 3rd period, group a, is the representative of alkali metal elements, soft texture, can react with water to form sodium hydroxide, release hydrogen, and the chemical properties are more active.

Physical properties

Sodium is a silvery-white cube structure metal, soft and light can be cut with a knife, the density is smaller than water, g cm3, melting point, boiling point 883.

The new facet has a silvery-white luster, which oxidizes in the air and turns into a dark gray color, which is corrosion-resistant. Sodium is a good conductor of heat and electricity, and has better magnetic conductivity than the state ridge, and potassium-sodium alloy (liquid) is a thermal conductive agent for nuclear reactors. Sodium element also has good ductility and low hardness, and can be soluble in mercury and liquid ammonia, and soluble in liquid ammonia to form a blue solution.

Hardens at 20.

A total of 22 isotopes of sodium have been discovered, ranging from sodium 18 to sodium 37, of which only sodium 23 is stable and the other isotopes are radioactive.