Some questions about the reaction of metals with water.

There is weak ionization in the water, and there are small amounts of hydrogen ions and hydroxides in the water.

The reaction between sodium metal and water first reduces the hydrogen ions in the water to generate hydrogen, and the sodium is oxidized into sodium ions, which is very reducible, and the concentration of hydrogen ions in the water can be relatively large even if the reaction rate is very low, and the ionization balance of the water can be moved, so hydrogen is continuously generated.

The reaction between iron and water is also the oxidation of iron by hydrogen, because the crystal structure of ferric tetroxide causes him to be a very stable oxide of iron, so it is easiest to produce it.

The reaction between aluminum and alkali solution itself is that water oxidizes aluminum to produce hydrogen and aluminum hydroxide, and like sodium, the dissolved sodium hydroxide in water reacts with aluminum hydroxide, moves in balance, and there is no precipitation adhesion, and the reaction can be carried out smoothly.

2al+2naoh+6h2o==2naalo2+3h2 +4h2o, generally the water on both sides is about to go.

Water is mainly in a molecular state, partially ionized, giving rise to H+ and OH -- but in equilibrium, as the temperature increases, the degree of ionization increases, and the latter one is essentially the electrons of aluminum that give the hydrogen ions that come out of the ionization of water, which gives hydrogen gas, and the aluminum ions and hydroxide produce metaaluminic acid and water, hydroxide and water, and aluminum.

No. Weakly ionized, but if the ions are consumed, the equilibrium shifts to the right--- NA reacts with H2O to form NAOH and H2, forming bases.

Fe reacts with H2O to form Fe3O4 and H2(Displacement reaction at high temperatures, the equilibrium principle can be explained).

Not all, very little.

Al undergoes a weak displacement reaction with water, which occurs due to the reaction of aluminum hydroxide and a strong base that causes the equilibrium to shift to the right.

1.Water exists in three forms: H+ and OH- and H2O.

2.Sodium reacts with water because sodium is too reactive and reducible, so hydrogen in water is reduced.

3.Iron reacts with water, requiring high conditions.

4.Aluminum and water also have OH- in sodium hydroxide, aluminum reacts with water first, and then reacts with OH-, aluminum reduction, and water oxidation.

Reaction between metal and water, the specific situation is collectively analyzed, K, Na this active metal is a class, mg this sub-active metal is a class, Fe is another class, just remember separately, especially pay attention to the different reaction conditions.

Water exists in the form of water molecules in solution, but a very small number of water molecules will weakly auto-ionize to form hydronium ions and hydroxide ions.

2H2O is reversible H3O+ +OH-

In high school it can be considered as the following reaction:

H2O is reversible H+ +OH-

In pure water, the ionization of water is very small. In a neutral solution, C(H+) and C(OH-) are only to the minus seventh power of ten, and mol is only 10 to the minus fourteenth power.

2Al+2NaOH+2H2O==2Naalo2+3H2 This reaction actually produces not metaaluminate ions, but tetrahydroxy-aluminium ions [Al(OH)4]-. The principle of the reaction can be understood as the loss of electrons by aluminum to H+ to release H2 gas, because it is an alkaline environment, aluminum ions will not precipitate aluminum hydroxide, but generate hydroxide ions to form tetrahydroxyl aluminium complex ions. However, in high school, you don't need to know the reaction principle, you just need to know that the alkaline environment is larger than the neutral environment, and the oh- concentration is larger, and the reaction tendency is greatly enhanced.

<> common metals that react with water are:

1. Lithium, symbol li, silvery-white metal, is the lightest metal. It can react with a large number of inorganic reagents and organic reagents, and the reaction with water is very violent, and it is easy to oxidize when exposed to air, so it is usually stored in liquid paraffin;

2. Sodium, a chemical element, its chemical symbol is NA, its atomic number is 11, sodium will oxidize rapidly in the air and react violently with water, so it can only exist in compounds;

3. Magnesium, symbolized as MG, is a light and malleable silvery-white metal, which is the eighth most abundant element in the earth's crust, and can react with hot water to produce hydrogen;

4. Calcium, a metallic element, symbol CA, is a silvery-white crystal at room temperature, and hydrogen is produced by reacting with water;

5. Aluminum, symbolized as AL, is a silvery-white light metal with malleability. Aluminum is a reactive metal, and a dense oxide film with a thickness of about 50 angstroms is immediately formed on the surface of aluminum in dry air, so that aluminum will not be further oxidized and can resist water, but aluminum in the molten state can react violently with water.

Metals such as lithium, sodium, potassium, rubidium, cesium, barium, magnesium, calcium, iron, and aluminum are able to react with water. Metals such as K, CA, NA, and BA can react with cold water, and mg can react with hot water.

1. K Na, reacts violently when exposed to cold water, and is prone to occur**.

2. Mg can react in hot water, and phenolphthalein becomes red, and Al can only react in boiling water.

3. Zn Pb does not react in cold water, but can react with water vapor under heating conditions.

Alkali metal. There are six (i.e. metals of the first main group): linakrbcsfr These can react with cold water.

Metals in the second main group Ca and below can also react with cold water. BA and MG react with hot water.

The second main group of be and the third main group of al are in the periodic table.

Diagonal in the middle.

location, similar in nature. They don't usually react with water (like aluminum pots can boil water, etc.), but they do under certain conditions.

Lively metal, cold water reacts violently;

Inactive metals that require hot water;

Metal oxides react with water to form bases, such as Na2O+H2O=2NaOH. The common metal oxides that react with water are: potassium oxide, barium oxide, calcium oxide, sodium oxide, lithium oxide and their corresponding peroxides, all insoluble oxides can not react with water, such as MG, Al oxides do not react with water.

That is, the oxide of a very reactive metal can be combined with hydration to form the corresponding hydroxide (base).

General rules of reaction of metal oxides with water:

1. Alkali metal oxide: M2O+H2O=2MoH;

2. Alkaline earth metal oxide: Mo+H2O=M(OH)2 (weak when M is BE and MG);

3. Other metal oxides generally do not react with water.

4. If the oxygen element in the metal oxide is not -2 valence, that is, peroxide or superoxide, it can undergo redox reaction with water.

Metal oxides play an important role in the field of catalysis and are widely used as main catalysts, co-catalysts, and carriers. In terms of main catalysts, metal oxide catalysts can be divided into transition metal oxide catalysts and main group metal oxide catalysts, the latter being mainly solid acid-base catalysts (see acid-base catalysis).

1. In the metal activity sequence table, the metal before aluminum can react with liquid water to generate corresponding alkali and hydrogen.

2. After aluminum, the metal before hydrogen can react with gaseous water to generate corresponding metal oxides and hydrogen.

3. Metals after hydrogen cannot react with water.

Sodium, cesium, rubidium metals can react with water.

The chemical properties of sodium are very active, and when heated at room temperature and heated, they are combined with oxygen, and react violently with water, and occur when the amount is large**. Relevant chemical equation: 2Na+2H O=2NaOH+H.

Cesium can react violently with water, and if you put cesium in a tank filled with water, it will happen immediately**. Rubidium reacts very violently when exposed to water, even when exposed to ice below 100 percent**.