The activity of magnesium, zinc and iron was compared, and the metal activity of zinc copper magnesi

Magnesium and hydrochloric acid react into magnesium chloride and hydrogen mg + HCL2 = mgCl2 + H2 fast.

Zinc and hydrochloric acid react into zinc chloride and hydrogen Zn+HCL2=ZNCL2+H2 generally.

The reaction of iron and hydrochloric acid into ferrous chloride and hydrogen Fe+HCL2=FeCl2+H2 is slow.

Magnesium and sulfuric acid react into magnesium sulfate and hydrogen mg+h2so4=mgso4+h2 fast.

Zinc and sulfuric acid react into zinc sulfate and hydrogen Zn+H2SO4=ZNSO4+H2 generally.

Iron and sulfuric acid react into ferrous sulfate and hydrogen Fe+H2SO4=FeSo4+H2 slowly.

The reaction is to release heat).

Therefore, magnesium, zinc, and iron will all bring out hydrogen ions of sulfate.

From the speed of hydrogen release, it can be seen that magnesium is the most active, zinc is second, and iron is not so active.

1.Respectively, it reacts with dilute hydrochloric acid, and the hydrogen that can be produced is magnesium, zinc, and iron.

What can't be reacted is copper and silver.

2.Magnesium, zinc, and iron are respectively injected into water to produce hydrogen. What cannot be reacted is zinc and iron.

3.Iron powder is added to ferrous chloride and zinc chloride solutions, and it is zinc that increases the solid mass after the reaction.

4.A solution of copper nitrate and silver nitrate is taken, and it is zinc that increases the solid mass after the reaction.

The order of activity is: magnesium, zinc, iron, copper, silver.

Magnesium is the most reactive, zinc is second, and iron is less active.

Magnesium and hydrochloric acid react to magnesium chloride and hydrogen mg + HCL2 = mgCl2 + H2 zinc and hydrochloric acid react to zinc chloride and hydrogen Zn + HCL2 = ZnCl2 + H2 iron and hydrochloric acid react to ferrous chloride and hydrogen Fe + HCL2 = FeCl2 + H2 magnesium reacts with sulfuric acid to form magnesium sulfate and hydrogen mg + H2SO4 = MGso4 + H2 zinc reacts with sulfuric acid to form zinc sulfate and hydrogen ZN + H2SO4 = ZNSO4 + H2 iron and sulfuric acid react to ferrous sulfate and hydrogen Fe + H2SO4 = FeSO4 + H2 So magnesium, zinc, and iron will all bring out hydrogen ions of sulfate.

Isn't there a mantra for mobility? Magnesium (> aluminum) > zinc > iron.

Two points should be paid attention to during the experiment, the first is the rate at which the bubbles emerge, and the second is the rate at which the solution rises.

When the temperature rises, magnesium heats up quickly, zinc (grains) heat up slowly, and iron (lumps) does not.

The mass fraction of hydrochloric acid and sulfuric acid should be the same.

Is it something that should be paid attention to during experiments or observations? Why not replace the electrodes that produce the gas after the displacement reaction or the formation of a galvanic cell and then placing it in acid to observe the gas?

**When the metal activity of zinc, copper, and magnesium is correct, the following phenomena, analyses, or conclusions are correct (c).

a.The concentration of hydrochloric acid can vary.

b.There are air bubbles on the surface of the copper sheet.

c.The surface of the tube with magnesium tablets is hot

d.Active CU>ZN>mg

Data Extension:

Zinc (Zinc) is a chemical element, its chemical symbol is Zn, its atomic number is 30, and it is located in the 4th period, group b in the periodic table of chemical elements.

Zinc is a light gray transition metal and is also the fourth"Common"of metal. In modern industry, zinc is an irreplaceable and important metal in battery manufacturing. In addition, zinc is also one of the essential trace elements for the human body and plays an extremely important role.

Copper (cuprum) is a metal element, but also a transition element, the chemical symbol Cu, English copper, atomic number 29. Pure copper is a soft metal, the surface is reddish-orange with metallic luster when it is first cut, and the elemental color is purple-red.

Good ductility, high thermal and electrical conductivity, so it is the most commonly used material in cables and electrical and electronic components, and can also be used as a building material, which can form many alloys.

The mechanical properties of copper alloys are excellent, and the resistivity is very low, the most important of which are bronze and brass. In addition, copper is also a durable metal that can be used many times without compromising its mechanical properties.

Magnesium (sedan pinyin: měi) is a general standard second-level character in Chinese. Metallic element, symbol mg (magnesium).

Silvery-white, lightweight, and glows a dazzling white light when burned. It is used to make glitter powder, pyrotechnics, etc., and magnesium aluminum alloy is used in aviation equipment.

Zinc, copper, and magnesium are all common metallic elements, and their metal activity belongs to the active, stable, and more active types, respectively. Zinc is a very reactive metal that reacts with acids, water, and oxygen, and even displaces other metal ions. Copper is a stable metal that reacts only at high temperatures and does not react significantly to acids, water, and oxygen.

Magnesium is a more reactive metal, not as reactive as zinc, but more reactive than copper and able to react with acids, water, and oxygen. The difference in the activity of the metal is related to the local companion atomic structure of the element, which mainly depends on the local electronic structure of the element and the stability of the metal ions. In terms of atomic structure, zinc, copper, and magnesium have different electronic structures, resulting in different metal activities in their metals.

In terms of metal ion stability, the more stable the ions, the less likely the metal is to react and vice versa. Therefore, understanding the atomic structure and ionic stability of metal elements is of great significance to understand their metal activity. In chemical reactions, metal activity is an important concept, and different metal elements play different roles in different chemical reactions, and understanding these effects is of great significance for chemical research and application.

Replacement of zinc with magnesium (replacement of reactive metals with inactive metals): mg zncl zn mgcl.

Metal activity refers to the tendency of metal elements to lose electrons in aqueous solution to form metal cations, which belongs to the category of thermodynamics.

Using metal activity, it is possible to compare the reducibility of a metal in water (but not in other environments or dry states) with the oxidation of its corresponding cations, and the direction of a series of displacement reactions in water.

Magnesium and zinc are both reactive metals and are highly reducible. When the chemical reaction is used to compare the activity, the oxidant is stronger than the oxidation product, and the reducing ability of the reducing agent is stronger than that of the reducing product. and how intense it reacts with the acid (note that it is vigorous, not the amount of hydrogen produced).

There are two common ones:

1. Replace zinc with magnesium (replaces inactive metal with inactive metal).

mg＋zncl2＝zn＋mgcl2

2. The conditions for the reaction with oxygen (the easier and more intense the reaction, the more active the metal is) 2mg+o2=ignition=2mgo (only need to ignite) 2zn+o2=ignition =2zno (need to be continuously heated).

mg+znso4=mgso4+zn

The reactive elemental is added to the solution with weak activity, and the reactive metal element can be replaced.

a. Iron cannot be corresponded to zinc sulfate, indicating that iron is not as active as zinc, so a can verify that zinc is more active than iron;

b. Zinc can react with ferrous sulfate, indicating that zinc is in front of iron, so B can verify that zinc is more active than iron;

c. Iron can react with copper sulfate, indicating that iron is in front of copper, and zinc can react with copper sulfate, indicating that zinc is in front of copper, but the activity of iron and zinc cannot be judged, so C cannot prove that zinc is more active than iron;

d. The metal with strong activity reacts violently with acid, and the reaction between zinc and dilute sulfuric acid is more intense than that of iron and dilute sulfuric acid, so d can verify that zinc is more active than iron

Therefore, C

According to the order of metal activity: k, ca, na, mg, al, zn, fe, sn, pb, (h), cu, hg, ag, pt, au, then the magnitude of metal activity is: mg zn fe cu, so the weakest metal activity is cu;

So the option is: c

To verify the order of metal activity of mafic iron, the reaction of magnesium with hydrochloric acid can be observed experimentally than that of iron with salt buried acid (violent), indicating that the metal activity of magnesium is stronger than that of iron

In order to verify the order of metal activity of copper and magnesium, the order of metal activity of iron needs to be supplemented by experiments (copper is added to dilute hydrochloric acid, and no significant change is found on the copper surface).

General conclusion: MG Fe Cu

The original Gaochuang, I hope to help you, if it helps you, your 10 points are satisfied, and our team's infinite motivation].

In order to verify the order of metal activity of ferric, it can be observed that the reaction between magnesium and hydrochloric acid can be observed by experiments, and the reaction between iron and hydrochloric acid is [vigorous], indicating that magnesium is more active than iron; In order to verify the metal activity sequence of copper and magnesium, the experiment that needs to be done is [reaction between iron and copper sulfate solution]; If the order of metal activity of copper and magnesium is verified, iron can be put into a copper sulfate solution, and the iron can replace the copper in the copper sulfate, thus indicating mg fe cu.

The reactive nature of metals, i.e. how easily a metal loses electrons and is oxidized.

The following experimental verification can be designed:

The same mass of magnesium, zinc, copper, iron into the same mass and concentration of hydrochloric acid or sulfuric acid solution, interval time, weighing, the smaller the weight, the more active. (Reason: The more active and the more intense the reaction, the more gas is lost after the same reaction time, so the weight is smaller).

Hope the above experiments are helpful to you.

As can be seen from the figure, magnesium, zinc and iron produce bubbles from fast to slow in the same time, and copper does not produce gas, so the relationship between the strength and weakness of metal activity is mg zn fe cu. The chemical equation for the reaction of iron and hydrochloric acid is Fe+2HCl=FeCl2+H2;

Therefore, the answer is: mg zn fe cu; fe+2hcl=fecl2 +h2 ↑；