What sodium sulfate reacts with sulfuric acid to produce

The reason why sulfuric acid can react with some salts to form another acid is because it has a high boiling point (of course, it is also strongly acidic), and like it, there is phosphoric acid. There are two principles in the preparation of acids: strong acids to weak acids, and high boiling point acids to volatile acids.

Here the two do not react, you see, suppose the reaction, the hydrogen ions will form sulfuric acid with the sulfate ions, there is no reaction. Similarly, the above person said that the generation of sodium bisulfate is also wrong, because it is impossible to have bisulfate in the solution (I mean the ionized state), the so-called sodium bisulfate, the use of excess hydrogen ions in the liquid will be generated, and if sodium bisulfate is generated in this reaction, the solution is not electrically neutral.

Sodium sulfate reacts with concentrated sulfuric acid to form sodium bisulfate, which does not seem to react with dilute sulfuric acid.

Sodium sulfite + water + dioxide.

At most, sodium bisulfate.

Is there a way to generate something? Sodium sulfate and sulfuric acid are both hexavalent, according to the above two said that the sulfur has been reduced by two valents for no reason, and the valence state of other elements remains unchanged? How can it be. It should not react.

It cannot be reacted because it contains sulfate.

The binary weak acid can react with the positive salt of its acid group to form an acid salt. Such as:

h2co3 + na2co3 ==== 2nahco3

However, sulfuric acid is a strong acid, so it does not react.

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

If you don't know what you can't answer, don't mislead people's children.

The reaction of sodium thiosulfate and sulfuric acid is Nas S O +H So = Na So +S +So + H O.

Sodium thiosulfate, also known as sodium sulfite, baking soda, and hypo, is a common thiosulfate with the chemical formula Na2S2O3, which is the product of the substitution of one oxygen atom by a sulfur atom in sodium sulfate, so the oxidation numbers of the two sulfur atoms are 2 and 6 respectively.

Production method. 1. The raw material used in the preparation of anhydrous sodium thiosulfate is sodium thiosulfate pentahydrate. The pure sodium thiosulfate pentahydrate crystals are heated to dissolve all of them in their own crystal water, and heated and concentrated below 100, until a large number of anhydrous crystals are separated from the Xunbei Bridge, and dried below 100.

2. Dehydration method is adopted: the crystallization of sodium thiosulfate pentahydrate is indirectly heated with steam to dissolve it in its own crystal water, and the anhydrous sodium thiosulfate product is prepared by concentrated mu shrinkage, centrifugal dehydration, drying and screening.

The above content reference: Encyclopedia - sodium thiosulfate rolling.

1. Sodium sulfite.

The chemical equation for the reaction with sulfuric acid: Na2SO3+H2SO4==Na2SO4+H2O+SO2; so3(2-)+2h+==h2o+so2↑。

2. The reaction of sodium sulfite and sulfuric acid is also a disturbing and complex process. This reaction reflects the acidity of sulfuric acid, and also shows that sulfuric acid is more acidic than sulfurous acid.

In the reaction of weak acid, the sulfurous acid produced is unstable to decompose sulfur dioxide.

gas and water.

Sulfuric acid does not react with sodium sulfate, only sulfuric acid reacts with sodium sulfite.

Sodium sulfite excess: H2SO4 + Na2SO3 = Na2SO4 + H2O + SO2.

Sulfuric acid excess: 2H2SO4 + Na2SO3 = 2NaHSO4 + H2O + SO2.

Sodium sulfate is chemically stable, insoluble in strong acids, aluminum, magnesium, and hygroscopic. When exposed to air, it is easy to absorb moisture and become aqueous sodium sulfate. At 241, it transforms into a hexagonal crystal.

High-purity, fine-grained anhydrous matter is called Yuanming powder. Highly soluble in water. The taste is cool and salty.

It is easily hydrated in moist air and converted into powdered hydrous sodium sulfate to cover the surface. Anhydrous miscanthus is produced in salt lakes containing sodium sulfate brine.

Sodium sulfate operation precautions

Closed operation with enhanced ventilation. Operators must be specially trained and strictly follow operating procedures. It is recommended that operators wear self-priming filtering dust masks, chemical safety glasses, anti-poison penetration overalls, and rubber gloves.

Avoid dust generation. Avoid contact with acids. When handling, load and unload lightly to prevent packaging damage.

Equipped with emergency equipment for spill treatment. Empty containers may leave harmful substances behind. When the dust concentration in the air exceeds the standard, a self-priming filtering dust mask must be worn.

In the event of an emergency or evacuation, a gas mask should be worn. Store in a cool, ventilated warehouse. Keep away from fire and heat sources.

It should be stored separately from acids, etc., and should not be mixed. The storage area should be equipped with suitable materials to contain the spill.

Sodium thiosulfateThe reaction with sulfuric acid is NaSO+HSO=NaSO+S +SO+HO.

If a strong acid reacts with a weak salt, a weak acid and salt are formed according to the principle of strong acid and weak acid.

But generally weak acid solubility.

Low, dry Zheng then if it is a tung judgment that is prone to volatile weak acid, it will generate gas, water and salt, like hydrochloric acid and carbonate reaction, the generated carbonic acid decomposes into water and CO2, and the non-volatile is directly generated weak acid and a salt, like acetic acid.

Salts and strong acids react to form acetic acid and salts.

Synthesis method of sodium thiosulfate:

1. Sodium sulfite method: from soda ash.

solution with sulfur dioxide.

Gas reaction, caustic soda is added for neutralization, sulfide alkali is added to remove impurities, filtered, and then sulfur powder is added.

Dissolved in the hot chakra sodium sulfite solution for reaction, filtered, impurities removed, re-filtered, caustic soda added for alkali treatment, concentrated, filtered, crystallized, centrifugal dehydration, screening, sodium thiosulfate finished products.

2. Sulfide alkali method: the raw material liquid prepared by using sulfide alkali evaporation residue and barium sulfide wastewater reacts with sulfur dioxide, and after clarification, sulfur powder is added for heating reaction, and the finished sodium thiosulfate is prepared by evaporation, cooling crystallization, washing and separation.

The reaction of sodium thiosulfate and sulfuric acid is Nas S O +H So = Na So +S +So + H O.

Sodium thiosulfate, also known as sodium sulfite, baking soda, and hypo, is a common thiosulfate with the chemical formula Na2S2O3, which is a roll-sensitive product in sodium sulfate in which one oxygen atom is replaced by a sulfur branching atom, so the oxidation numbers of the two sulfur atoms are -2 and +6 respectively.

Physicochemical properties. Melting Point: 48°c

Boiling Point: 100°C

Density: Appearance: colorless or white crystalline powder.

Solubility: soluble in water and turpentine, insoluble in ethanol.

Encyclopedia - Sodium thiosulfate.

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

na2s2o3+h2so4=na2so4+s+so2+h20

The ionic equation is:

s2o3＾2-+2h+=so4＾2-+s+so2+h2o。

Sodium thiosulfate, also known as sodium sulfite, baking soda, hypo, is a common thiosulfate with the chemical formula Na s o and the molecular weight, which is the product of the substitution of one oxygen atom by a sulfur atom in sodium sulfate, so the oxidation numbers of the two sulfur atoms are -2 and +6 respectively.

1) **When reacting to the influencing factors of temperature, the experiments that can be based on are A and C or B and D (fill in the experimental serial number).

2) **When the reactant concentration affects the factor, the experiments that can be based are A and B or C and D (fill in the experimental serial number).

3) Different volumes of water were added to each group of experiments to ensure that the total volume of the final solution was equal

4) The first precipitate in the four groups of experiments was D (fill in the experimental serial number), because the reaction concentration in group D was large and the temperature was high.

Answer: (1) When the reaction temperature influencing factors, the control variable is temperature, and the other conditions are exactly the same, and the other conditions in A and C, B and D are the same, but the temperature is different, so the influence of temperature on the chemical reaction rate can be studied, so the answer is: A and C or B and D;

2) ** When the reactant concentration affects the factor, the variable to be controlled is the concentration, and the other conditions are exactly the same, and the other conditions in A and B or C and D are the same, but the concentration is different, so the effect of concentration on the chemical reaction rate can be studied, so the answer is: A and B or C and D;

3) Different volumes of water were added to each group of experiments, the purpose was to make the volume of the final solution the same, and only one physical quantity of the control device was changed, so the answer was: to ensure that the total volume of the final solution was equal;

4) The higher the temperature, the greater the concentration of reactants, the faster the reaction rate, the first precipitation, according to the data in the table, the temperature of A and B devices is less than C and D, so the reaction rate of C and D is greater than A and B, and the concentration of D device is greater than C, so the reaction rate in D is greater than C, then the first to produce precipitation is D, so the answer is: D; Group D reactants have a large concentration and high temperature.

Comment This question examines the factors that affect the reaction rate, which is a high-frequency test point, and clarifying the principle of the impact of the reaction rate is the key to solving this question, note: only one variable can be controlled when studying the factors affecting the reaction rate, and the other physical quantities must be exactly the same, otherwise the correct conclusion cannot be drawn, and the problem is not very difficult.