The concentration of the diluted sulfuric acid solution. Correct operation of dilution of concentrat

Solution: The density of concentrated sulfuric acid is, so m(H2SO4)= N(H2SO4)=

c(h2so4)=

Missing data. If you know the density of the solution at the beginning, you can calculate the concentration. Suppose the density of concentrated sulfuric acid is a g cm3, then.

Concentration = (1000*A*Formula C=(1000*A*W) m, where C represents the amount concentration of the substance, and the unit is mol L;

A represents the density of the solution in g cm3;

w represents the mass fraction of the solution;

m represents the molar mass of the solute in g mol

It doesn't seem to be concentrated sulfuric acid, right? The most concentrated seems to be 98% concentrated sulfuric acid, and the density of 98% concentrated sulfuric acid is, so m(H2SO4)=

n(h2so4)=

c(h2so4)=

Correct operation of dilution of concentrated sulfuric acid: When diluting concentrated acid, concentrated acid should be slowly injected into water along the wall of the container, and it is absolutely forbidden to inject water into concentrated acid.

The density of concentrated sulfuric acid is greater than that of water, it is easily soluble in water, and a large amount of heat is released when it is dissolved in water, if the water is poured into the concentrated sulfuric acid, the water will float on the surface of the water, and the heat released will make the water boil, thus causing the phenomenon of acid splashing, so when diluting concentrated sulfuric acid, the concentrated sulfuric acid is poured into the water, and constantly stirred with a glass rod to make the heat generated diffuse rapidly.

How to dilute sulfuric acid

Concentrated sulfuric acid, commonly known as bad water, with the chemical formula H SO, is a strong mineral acid with high corrosiveness. Concentrated sulfuric acid refers to a solution of sulfuric acid with a mass fraction greater than or equal to 70%.

1. The density of concentrated sulfuric acid is much larger than that of water, and directly adding concentrated sulfuric acid to water will make the water float on the surface of concentrated sulfuric acid, and a large amount of exothermic will cause the acid to boil and splash out, causing accidents. Therefore, when the concentrated sulfuric acid is diluted, the concentrated sulfuric acid is often slowly injected into the water along the wall of the vessel (the flask is drained with a glass rod), and constantly stirred to dissipate the heat generated by the dilution in time.

2. Do not reverse the order, which will cause accidents. Remember to "pour acid into the water, pour it slowly along the wall of the vessel, and stir constantly", "dilute the concentrated sulfuric acid, pour the concentrated acid into the water droplets, pour it slowly along the wall of the vessel, and stir your hands without leaving". Inject acid into water, stir constantly, and the diluted sulfuric acid should be cooled to room temperature and stored in the reagent bottle.

The correct operation of concentrated sulfuric acid dilution is as follows:The correct way to dilute concentrated sulfuric acid is to dilute it by slowly adding it to a beaker filled with water. The steps are as follows.

1. Prepare a beaker with water and concentrated sulfuric acid that needs to be diluted.

2. Open the cap of the concentrated sulfuric acid bottle and slowly pour the concentrated sulfuric acid into a beaker filled with water.

3. While slowly pouring in the concentrated sulfuric acid, stir continuously with a glass. The heat emitted during dilution is diffused.

The correct way to dilute concentrated sulfuric acid is to dilute it by slowly adding it to a beaker filled with water. The steps are as follows.

1. Prepare a beaker with water and concentrated sulfuric acid that needs to be diluted.

2. Open the cap of the concentrated sulfuric acid bottle and slowly pour the concentrated sulfuric acid into a beaker filled with water.

3. While slowly pouring in concentrated sulfuric acid, stir continuously with a glass wide-cavity cup. The heat emitted during dilution is diffused.

Correct operation of dilution of concentrated sulfuric acid

The density of concentrated sulfuric acid is much greater than that of water, and water is added directly to the concentrated sulfuric acid to make the water float on the surface of the concentrated sulfuric acid, and a large amount of exothermic heat makes the acid solution boil and splash out, causing an accident.

Therefore, when diluting concentrated sulfuric acid, the concentrated sulfuric acid is often slowly injected into water along the wall of the vessel (drained with a glass rod), and stirred constantly to disperse the diluted heat in time.

Don't reverse the order to avoid accidents. Remember to "pour acid into the water, pour it slowly along the wall of the vessel, and stir constantly", "dilute the concentrated sulfuric acid, pour the concentrated acid into the water droplets, pour it slowly on the wall of the vessel, and stir the hand without hail. Inject the acid into the water and stir constantly, and the diluted sulfuric acid should be cooled to room temperature before being placed in the reagent bottle.

What happens if you pour water into concentrated sulfuric acid to dilute it:

The dense sulfuric acid meets the water and a chemical reaction takes place to release a large amount of heat. The heat released by the reaction of 1 kg of concentrated sulfuric acid with water is enough to instantly raise 2 kg of cold water to 100 high temperatures. The concentrated sulfuric acid with a larger specific gravity is twice that of water.

Therefore, if water is poured into concentrated sulfuric acid, and the water floats on the concentrated sulfuric acid, when a chemical reaction occurs, the water will boil violently and splash around with sulfuric acid, which is very dangerous.

If concentrated sulfuric acid is poured into the water, the situation is completely different, the concentrated sulfuric acid is heavier than water, it will slowly sink into the water and then disperse to the various parts of the solution, so that the heat generated by the reaction is evenly distributed throughout the solution, and the temperature will only rise slowly, not slightly boiling.

Naturally, don't forget the five words "pour it slowly", if you pour concentrated sulfuric acid into the water quickly, due to too much heat, too fast, and uneven stirring, the water will also boil and splash out of the container.

Concentrated Sulfuric Acid Introduction:

It is an aqueous solution of sulfuric acid with a mass fraction greater than or equal to 70%, commonly known as bad water. Concentrated sulfuric acid is highly corrosive: at atmospheric pressure, boiling concentrated sulfuric acid can corrode all metals except iridium and ruthenium, and the number of elemental metal species that can be corroded even exceeds that of aqua regia (but the corrosion rate is different).

Sulfuric acid has strong oxidizing properties at high concentrations, which is one of the biggest differences it has from dilute sulfuric acid. At the same time, it also has dehydration, difficult volatility, acidity, water absorption, etc. Similar to nitric acid, the reduction product may be sulfur dioxide, sulfur element, or sulfide depending on the type and amount of reducing agent.