Hydrogen is made in addition to sulfuric acid and zinc? What is the chemical formula of zinc sulfate

Haha, it depends on whether you are playing at home for the sake of answering the questions or making it yourself at home.

In middle school, the reaction between pre-hydrogen metals and moderately strong acids (except for nitric acid, where no hydrogen comes out), as well as the reaction of Al and Naoh, and the electrolysis of water.

If it is made and played, I have used cuso4 concentrated (chemical stores have, like 20 yuan a bottle, the flower and bird market may also have it, because some people buy it with Bordeaux liquid) solution and aluminum bars, with a dime or a Coke can (or Sprite) can be, the key to success is to add salt, and must add more (may be cl- to destroy the oxide film of aluminum), the reaction is very fast, and you can observe the exothermic phenomenon, as well as the diving of aluminum sheets.

Lively metal and strong acids.

Examples: iron and sulfuric acid, iron and hydrochloric acid, zinc and hydrochloric acid, etc.

PS: Nitric acid is generally not used, because the reaction is very complex and does not produce hydrogen over

When I take the exam, I usually write acid and general metal... Hydrogen in front of the non-oxidizing dilute acid is OK...

If you want to be relatively pure, you generally need to solve the water... Generally, it is an aqueous solution of electrolytic barium hydroxide or sodium hydroxide

If you do it yourself, you can use alkali and amphoteric metals... I generally use sodium hydroxide and aluminum foil ·· Soon·· Reacts faster than acid and aluminum··· And aluminum foil is everywhere.

There are many ways. With acid, sulfate, hydrochloric acid (dilute).

With all the metals before h in the table of metal activity sequences, that is, the active metals (commonly used iron, Lu, Xin, tin) react in pairs, 8 reactions.

Zinc and dilute sulfuric acid are generatedZinc sulfateand hydrogenChemical equationsAs follows:

zn+h2so4=znso4+h2↑

"First of all, why zn is used From the metal activity order table, it can be seen that the activity of zn is neither high nor low (just a little before h), so that the rate of reaction with acid to form h2 is appropriate, which is convenient for collection.

Why use dilute sulfuric acid There are three main acids in middle school Sulfuric acid, hydrochloric acid and nitric acid Among them, hydrochloric acid is volatile when heated, and the purity of H2 is produced due to the exothermic effect of the reaction to affect the volatilization of HCL Nitric acid, even if it is dilute nitric acid, it has strong oxidation, that is to say, it reacts with Zn to mainly produce NO and NO2 Concentrated sulfuric acid If you want to explain it in depth, there are many reasons, and it is not yet understandable in the junior high school stage, so it can only be said that the generated zinc sulfate covers the surface of zinc and hinders the continuation of the reaction Therefore, dilute sulfuric acid is used.

And a little bit more off-topic, when you do the question, you have to choose an acid reaction, and the order of consideration must first consider whether you can use dilute sulfuric acid, there is a sentence that you can use sulfuric acid, not hydrochloric acid, and use nitric acid with caution"

Zn is used first because if the reaction is too fast with mg, it is too slow with fe. The ZN speed is moderate, which is convenient for gas collection. Dilute sulfuric acid is then used instead of hydrochloric acid because hydrochloric acid is volatile and affects the purity of the gas.

The time for zinc and dilute sulfuric acid to produce hydrogen is neither fast nor slow, and it is convenient to collect.

"Why use zn in the first place

According to the table of metal activity sequence, the activity of Zn is neither high nor low (just a little before H), which makes the rate of reaction with acid to form H2 appropriate, which is convenient for collection.

Why dilute sulfuric acid.

There are three main acids in secondary school.

sulfuric acid, hydrochloric acid and nitric acid.

Among them, hydrochloric acid is volatile when heated, and due to the exothermic reaction to volatilize HCl, the purity nitric acid of H2 is affected, and even the dilute nitric acid has strong oxidation, that is to say, it reacts with Zn to mainly produce NO and NO2

There are many reasons for the concentrated sulfuric acid to be explained in depth, and it is not yet understandable at the junior high school stage, so it can only be said that the generated zinc sulfate covers the zinc surface and hinders the continuation of the reaction.

Therefore, dilute sulfuric acid is used.

A little more off topic.

When you do the problem, you are asked to choose an acid reaction.

The order of consideration must first consider whether dilute sulfuric acid can be used.

There is a saying. Sulfuric acid can be used, no hydrochloric acid, nitric acid should be used with caution"

The chemical formula of zinc sulphate is ZNSO. Zinc sulfate (Zinc sulfate; white vitriol), also known as alum, zinc alum, is colorless or white orthorhombic crystal or powder at room temperature, astringent, soluble in water, aqueous solution is acidic, slightly soluble in ethanol and glycerol. Pure zinc sulfate does not turn yellow when stored in the air for a long time, and loses water in dry air to form a white powder.

There are a variety of hydrates: a stable hydrate that balances with water in the range of 0 39 is zinc sulfate heptahydrate, zinc sulfate 6 hydrate within 39 60, and zinc sulfate monohydrate within 60 100.

When heated to 280, various hydrates completely lose their crystal water, decompose into zinc oxide sulfate at 680, further decompose above 750, and finally decompose into zinc oxide and sulfur trioxide at about 930.

1. Copper sulfate.

It is a strong and weak alkali salt, hydrolyzed and acidic, when copper sulfate reacts with zinc:

cuso4+zn=znso4+cu

zn+2h+=zn2+

H22, the red color on the surface of zinc is the precipitated copper, the bubbles are because of the formation of hydrogen, and the reaction of zinc to hydrogen is an exothermic reaction.

The green color is due to an excess of copper sulphate, or it may be due to other anti-cherry regressions, depending on whether it is a green solution or a green turbidity.

3. If you want to cope with the college entrance examination, it is enough to understand the principles of redness, bubbles and exothermy.

Displacement reaction, redox anti-sensitization should occur.

What is the reaction of sulfuric acid and sodium hydroxide and does redox reaction occur.

Metathesis reaction, no redox reaction occurs.

What is the reaction of alcohol burning in oxygen, whether the oxygen bridge shedding reduction reaction occurs.

Chemical reactions, where redox reactions occur.

What is the reaction of calcium carbonate and hydrochloric acid to make carbon dioxide, whether oxidation or bending of the cypanogen reaction occurs.

Metathesis reaction, no redox reaction occurs.

Carbon monoxide reduces ferric tetroxide.

Chemical reactions, where redox reactions occur.

Zinc grains react with dilute sulfuric acid to produce hydrogen, and at the same time generate zinc sulfate.

The chemical equation of the reaction.

is: zn+h2

so4znso4h2

After closing the spring clamp in the f device, the gas generated in the device cannot be discharged, and the gas pressure in the device increases, so that the liquid is pressed back into the long-necked funnel, the liquid level drops, the reaction liquid and the bulk solid are separated from the mountain, and the reaction stops; To make the reaction occur, open the spring clamp; Therefore, the advantage of being a hydrogen generator is that the reaction can be controlled at any time

If the bottle is filled with water first, use the drain only liter method.

When collecting hydrogen, the long conduit is the outlet pipe, and the hydrogen should be passed through the B terminal, so the answer is: Zn+H2

so4znso4

h2；The occurrence and stop of the reaction can be controlled at any time; ③b．

It is ZN+2H2SO4 (concentrated) ==ZNS04+SO2 +2H2O

However, with the continuous consumption of concentrated sulfuric acid, the concentration becomes thinner and reacts with zinc to form hydrogen, so finally hydrogen and sulfur dioxide are mixed gas. If zinc reacts with dilute sulfur source acid, it only produces hydrogen. If the inactive metal of Namin and concentrated sulfuric acid are reacted after H, only SO2 is generated, and the reaction stops when the concentration is reduced.