As soon as Sun stabilized the heroes, he left in a hurry, because his battery progress today was greatly behind. Pen % fun % Pavilion www.biquge.info

Wang Erniu had already arranged that after the dinner the day before, the people of the Tiemu camp would send their rice bowls over by themselves, fully supporting Lidel Ye's "formation method". And Sun Yi wants to find a way to increase the current intensity of the volt battery before dinner.

Sun Yi has almost forgotten the specific electrochemical knowledge, and simply understands that the faster the electrode is corroded, the greater the current generated.

There are three ways to accelerate electrode corrosion:

The first is to increase the area of the electrode sheet.

The second is to replace the electrode material. The anode material commonly used in later generations is metal zinc, but zinc is not easy to solve at present; Even the iron electrode is more mobile than the current tin electrode, but in view of the forging level of the iron-wood camp, it is difficult to obtain the iron sheet electrode at present.

The third is to replace the more corrosive electrolyte. The current battery is corroded by salt water, and Sun Yi decided to try to make some acid.

Afraid that he wouldn't be able to catch up, Sun Yi specially transferred two older children from the orphans to help him.

Their first task was to make a special stove.

In an open place, three people and a pile of yellow mud. First, a simple shelf was built with tree branches, and then the yellow mud was pasted layer by layer to make a hollow one-foot-square "grave pile". In front of the "mound" is a small furnace door, and a two-inch chimney hole is left on the top.

Then it's time to make a special chimney.

Sun Yi found a thick wooden stick and first loosely wrapped a layer of hay around the stick. Strips of rags dipped in plaster powder, sprinkled with water, and quickly wrapped around wooden sticks – the standard way to apply plaster to a person with a broken bone.

In just a few minutes, the plaster initially solidified.

Sticks and hay were pulled out, and a hollow plaster pipe was made.

The three men kept lengthening the plaster tube while bending the sticks, eventually forming an inverted U-shaped plaster chimney.

One end of the plaster chimney is inserted into the reserved hole in the stove and sealed with yellow mud.

The other end of the plaster chimney opened and rushed down and hung in the air.

Sun Yi found some hollow wheat stalks six or seven inches long, applied wet plaster to the outside of one end of each straw, combined the wheat straws into a bunch, and inserted them into the hole in the empty gypsum chimney.

In just a few minutes, the straw bundle was fixed.

Then carefully seal the possible air leaks in the yellow mud, and the furnace is done!

The next step is acid production.

Place a clay pot filled with water underneath the straw and raise it with soil so that the straw submerges into the water.

The yellow mud in the furnace was still wet and dry, and Sun Yi used a pile of wheat straw to pad it underneath, sprinkling a layer of nitrate and a thick layer of sulfur.

Lighting the fire with a fire sickle, Sun Yi lit the wheat stalks in the furnace.

Mixed with sulfur and nitrate, the wheat stalks burned brightly.

Immediately, a pungent smell hit my face.

The prepared child held a ball of yellow mud and slammed it on the stove, sealing the stove.

The three of them immediately ran away.

Because the stove made of yellow clay had not yet dried, a stream of white water vapor diffused from the stove.

Sulfur, nitrate, and wheat straw may sound like black powder, but the ratio of the three components is completely different from gunpowder: sulfur is the most, followed by nitrate, and wheat straw is second.

Such a ratio will never cause an explosion, only a large amount of gas will be produced.

Sure enough, gas gushed out along the passage of the plaster chimney and wheat straw, and the water in the crockpot began to churn.

Sulfur combustion produces sulfur dioxide gas.

Nitric combustion produces nitric oxide and nitrogen dioxide gases.

Catalyzed by nitric oxide, sulfur dioxide is converted into sulfur trioxide.

Wheat straw burning produces carbon monoxide and carbon dioxide gases.

The water vapor in the furnace and the water in the crockpot provide the solution.

Sulfur trioxide dissolves in water and is sulfuric acid. Sulfur dioxide dissolves in water and is sulfurous acid.

Nitrogen dioxide dissolves in water and is nitric acid. Nitric oxide dissolves in water and is nitrous acid.

Carbon dioxide dissolves in water and is carbonic acid. Carbon monoxide is soluble in water...... Carbonous acid? I don't think I've heard of this acid.

Anyway, a lot of acids end up dissolving in the water of the crockpot.

This is the recipe that Sun Yi found after checking for a long time last night. Before the invention of the "lead chamber method" to produce sulfuric acid, Westerners used nitrate, sulfur, and water vapor to burn together to produce sulfuric acid.

The biggest disadvantage of the sulfuric acid produced by this method is that the concentration is not high, not exceeding 76%, and it inevitably mixes nitric and nitrous acids.

But Sun Yi wanted some dilute acid that could corrode tin, and this method was enough for him!

The smoke from the stove seemed to have stopped, and the two children wanted to run back to have a look, but Sun Yi resolutely stopped them.

Sulphur dioxide is irritating, and the air pollutant in later generations is mainly sulphur dioxide. Generally speaking, sulfur dioxide does not easily become sulfur trioxide, the raw material of sulfuric acid, and this chemical reaction can only occur in the presence of a catalyst. In addition to the highly toxic nitric oxide, which can be used as a catalyst, atmospheric particulates, such as PM2.5, are also extremely efficient catalysts. In smog, sulphur dioxide is rapidly converted to sulphur trioxide, which dissolves in water vapour to form acid rain and generates tiny sulphite and sulphate particles. When these particles are inhaled, they accumulate in the lungs and are a major cause of respiratory diseases.

Nitric oxide and nitrogen dioxide are also irritating, but low concentrations (4ppm) of nitrogen dioxide can paralyze the nose, in other words, blind the nose, causing people to absorb excessive odors without smelling the pungent odor. The most important sources of nitric oxide and nitrogen dioxide emissions in later generations were internal combustion engines, thermal power plants, and pulp mills. If nitric oxide and nitrogen dioxide are inhaled, there are only mild eye and respiratory symptoms at first, but pulmonary edema can occur after an incubation period of hours, more than ten hours or more! Nitric oxide and nitrogen dioxide in haze can form nitrite and nitric acid with water vapor, and produce nitrite particles and nitrate particles floating in the air.

As a generation that grew up in smog, Sun Yi is very aware of the harm of these sulfur and nitrogen exhaust gases, so he must wait for the poisonous gases to completely dissipate.

The water in the crockpot also stopped, and Sun Yi waited for a long time before running back to check.

The wheat straw has been smoked white!

Sulphur dioxide is a bleaching agent that can fade substances in the presence of water, especially paper and clothing.

The wheat straw is smoked white, indicating that it has an effect

Sun Yi had been accustomed to the refreshing air of Chongzhen for five years, and when he heard these sulfur and nitrogen poisonous gases, he first coughed a few times, and then actually gave birth to a long-lost cordial feeling from the bottom of his heart!

Sun Yi instructed the two children to open the stove and repeated the same process several times using the same jar of water.

When it was time for dinner, Sun Yi carried a bucket of mixed acid of unknown concentration and composition, and happily returned to the shack.