Some minor problems with the transformation of matter, what is the transformation of matter

2. Metal oxide + H2O hydroxide.

3. Acid + alkali salt.

5. Alkali + acid salt.

This, why do you need to convert? How so? Sometimes we need it to be transformed, for example, we need oxygen to breathe, so we electrolyze water, and the water splits into hydrogen and oxygen, and the oxygen is for us to breathe.

The other is the transformation of the natural world, which involves physics.

Matter is a Chinese word, pinyin is wù zhì, which means an objective reality that exists independently outside people's consciousness and can be reflected by people's consciousness. Lenin pointed out: "Matter is the philosophical category that marks the objective reality that man perceives through his senses, which exists independently of our senses, and which are reproduced, photographed, and reflected by our senses."

Everything in the world has Li Xiao's infinitely diverse forms, infinite changes and developments, but in the final analysis, they are the external manifestations of objective reality and the external manifestations of matter. Consciousness is only an outward manifestation of a highly developed matter.

In the philosophical circles' efforts to transform Marxist philosophy, there is a popular viewpoint, that is, to make an internal distinction between the material concept of Marxism, which is shown to be the "opposite" between Marx's material concept and the views of Engels and Lenin, and only the material concept of Western Marxism can truly inherit and develop Marx's "theory of practical and historical mediation".

However, this is often done to dissolve the "objective reality" of matter, and one-sidedly render the material world separated from man as "nothing", that is, only the material world in which human practice intervenes is the "matrix" of Marx's investigation. To recognize this misunderstanding, it should be clarified that Western Marxism distorted Marx's material concept, and only Engels and Lenin were the real developers of Marx's material concept.

d. If CO2 is introduced into MgCl2, it is not possible to generate MgCO3 and HCl, and strong acid makes weak acid; Therefore, only NaCO3 is added to generate MgCO3, but the NaCO3 solution will appear alkaline, and Mg2+ will directly form more insoluble Mg(OH)2 with OH-, throwing CO3 2- aside.

Everything else will do, which option won't, I'll add to that.

Consciousness can be transformed into matter, because there is identity between matter and consciousness, and consciousness can be transformed into matter through practice.

The opposition between consciousness and matter has absolute meaning only within the scope of what is primary, beyond which the opposition is relative. In other words, the opposition between matter and consciousness should not be absolutized, otherwise we will fall into dualism or agnosticism. This is because, although matter does not depend on consciousness to exist, consciousness depends on matter, consciousness is the product of matter, the reflection of matter by the human brain, and the reflector cannot be separated from the object being reflected, there is identity between matter and consciousness, and consciousness can be transformed into matter (through practice).

Consciousness is the function and attribute of the "human brain", not the inherent attribute of all "matter", and consciousness is the "product" of matter, not the "existence form of matter" (movement is the form of existence of matter), and consciousness and matter cannot be confused.

First of all, it is mentioned that b is a non-metallic element of black powder, then b is a carbon element...

C is a common colorless and odorless liquid (in high school, it is generally just said that this is water, and you don't have to think about it...)

It is said that d is a pale yellow solid compound, and in high school inorganic, the pale yellow has a slow letter sodium oxide, sulfur element, and silver bromide, and silver bromide is not tested at all, and sulfur elemental matter, which is required in the question. So it can only be premature hand sodium oxide...

Therefore, if it is said that A, it can only be aluminum, because it is followed by a solution, if it is magnesium or iron (the common metals in high school have sodium, magnesium, aluminum, iron, copper) should be precipitated.

Solu which is suspected to reflect 1 Na2O2+4H2O+2Al===2Naalo2+O2+4H2 remember to bring the gas symbol.

Then solution A is sodium metaaluminate solution, E can reflect with C carbon element, so F is O2, E is H2, then reaction 2 is the reaction of carbon and oxygen, which is related to the amount of oxygen. Then g is carbon dioxide and h is carbon monoxide

Then k is sodium carbonate, which is dissolved in water into a solution of sodium carbonate solution, and the equation of 3.

2Na2O2+2CO2===2Na2CO3+O2 This does not need to be marked with a gas symbol, because there are gases before and after the reaction...

Then the reaction of A and G produces aluminum hydroxide precipitate and sodium carbonate solution.

In fact, this question is not difficult, the key is to see your familiarity with these required metals and non-metals, and understanding of chemical equations...

Option c Copper does not react with hydrochloric acid, and the chloride behind copper is basically insoluble in water or non-existent.

a fe(oh)3+3hcl==fecl3+3h2ob co2 +ca(oh)2 ==caco3↓+ h20c mgcl2+2koh==mg(oh)2↓+2kcl

A can be converted in one step by adding hydrochloric acid b by adding calcium hydroxide can be converted in one step d by adding potassium hydroxide can be converted in one step So choose C

If you are a junior high school student, choose C. If it's high school or above, there's no answer.

I'll answer it anyway.

The arrow, whether it is full (like an arrow pointing to B) or missing (like an arrow pointing to C), refers to the substance to which the arrow is formed by reaction.

If two substances are connected in a straight line and both point to one substance, the two substances react to form that substance. (e.g. c+e --e).

The fact that two substances are connected in a straight line does not point to one substance, indicating that the two substances can react, but do not produce the substance that the arrow refers to (or the substance that generates is not just the substance that the arrow refers to).

Such as b+e, d+e

Inference questions are all about finding information. c in the air content is about 21 and is oxygen.

A decomposes to produce oxygen and B, then A is hydrogen peroxide and B is water.

In the title, "If F is an oxide", and F is combined with oxygen to form E, the common substance that oxides can react with oxygen in junior high school is carbon monoxide. F is carbon monoxide and E is carbon dioxide.

e carbon dioxide can react with d, while b water can be converted to d, d can be calcium hydroxide.

1) O2 (no explanation).

Since C is O2, we should be concerned that A can make O2, but O2 cannot make A, so A may be H2O2 (because KMNO4 KCLO3 is not required for high school mastery), then B is water.

F is an oxide, and E can be generated, while C can go directly to E, and it is estimated that E is CO2, and F is Co Be, and the base is added to the interconversion of Co Be.

d. It is impossible to judge because the direction of the arrow is unknown.

Then I secretly looked up the answer was ca(oh)2).

1. C is oxygen (O2).

2. CaO+H2O==Ca(OH)2 chemical reaction.

3. CO 2CO + O2 = ignition = 2CO2

H2O = energized = 2H2 + O2 CO2 + Ca(OH)2==CaCO3 + H2O

The key to solving the inference problem is to find the breakthrough point (follow the hints and familiar knowledge), and then push out the rest of the matter one by one.

For example, in this question, you can first know that it is oxygen from "c is about 21 in air (volume fraction)". A generates oxygen and B, B can also produce oxygen, and it can be known that B is water and A is hydrogen peroxide (H2O2).

As for the def, there are many possibilities, but according to the title, "If F is an oxide", and F and C (oxygen) react to form E, E and F can be carbon dioxide and carbon monoxide, respectively. The last introduced d is calcium hydroxide.

1 is O2, which seems to be a conversion of carbon.

The answer and the process of answering have been answered by other netizens, so there is no need for me to repeat it. In order to solve this kind of inference question, it is not only necessary to find a breakthrough in the exam, but the most important thing is to pay attention to the usual accumulation! Be mindful of the properties of every element you encounter or the equations about it!