初中化学推断题专辑有答案（Junior chemistry deduction question
album has an answer）
Junior High School Chemistry inference album
1. A, B, C, D, E, F, g are common substances, of which B, E, G belong to the elemental, the reaction ② is the main reaction in the ironmaking industry, the following diagram is the mutual transformation between them. Please answer:
(1) A chemical formula for a substance.
(2) write the chemical equation of reaction ②,
The name of the solid substance of C when the substance is used in real life.
(3) Write a chemical formula that produces a red solid in the reaction ③.
(4) The reason for the colorless gas g generated in the conversion of the above image is that
Write the chemical equation of the reaction of the substance G and a in the heating condition
2. The existing mixture of three kinds of sodium salt which is soluble in water in middle school chemistry is dissolved in a colorless solution after water, and the following results are obtained:
Try to answer the following questions:
(1) The chemical formula of colorless gas d is, the chemical formula of white precipitate e is, the chemical formula of barium salt B.
(2) The chemical formula of three soluble sodium salts contained in the original mixture is,, respectively.
3. In order to remove salt (mainly NaCl) samples containing a small amount of magnesium chloride and sodium sulfate impurities, a student according to the basic principle of refined salt water in the chlor-alkali industry, using the knowledge to design the following figure shown in the ① to ⑤ step impurity scheme:
Please answer the following questions according to the above-mentioned impurity scheme:
(1) Sedimentation A is the solute in filtrate C;
The effect of adding excess hydrochloric acid to the operation ⑤ is.
(2) Assuming that the material is not lost during the whole operation, the quality of the solid Dingzhong NaCl is higher than that of the original sample (fill up, no change or decrease); If the ② in the operation is replaced by an overdose of Koh solution, the impurities in the solid butyl may contain.
5. Existing A, B, C, D, E, F, g Seven of substances, C, F is
the most common metal, B is the gas elemental, D is a light green solution, G is blue solution, they exist between the following relations:
(1) Try to speculate the following chemical formula: b_________, d_________, f_________.
(2) write the chemical formula of c→a transformation: __________________.
6. A, B, C, D, e are common in junior high school chemistry 5 kinds of colorless gas, of which 2 kinds are simple substance, 3 kinds are compound. The transformation between them is shown in the following figure.
Please write down your inference results:
A, B, C, D, E.
7. A, B, C, d four kinds of colorless solution, respectively, a dilute solution. A classmate only use purple litmus test liquid to distinguish these four kinds of solution. The experimental phenomenon is:
(1) The purple litmus test liquid drops into the test tube containing a, B, C, d four kinds of solution respectively, a becomes blue, B does not change, C, D turn red;
(2) Another to add a C, D solution in the test tube, c no obvious phenomenon, d in the white precipitate formation.
According to the above experiments, the solute in A is ___________ and the solution of solute is ___________ (filling letter code), the solution is ___________. If a silver nitrate solution is added to B, the ___________
_________________________________。
8. It is known that a, B, C, d Four substances all contain the same element, where a is a simple substance, B is a black solid, and C is a red solid.
There is a transformation between them: (1) A can be converted into B or C under different conditions, (2) A and dilute sulfuric acid reaction has d generation, (3) in
high-temperature conditions, B, c respectively and colorless gas e reaction, can generate a and another colorless gas. According to the above information, write down the chemical formula of the following substances:
A ； C ； D ； E 。
9. The relationship between oxides, acids, alkalis and salts is one of the important learning contents in the natural science of junior Middle School. There is a transformation relationship as follows:
Please write the chemical formula of a substance, the chemical formula of G substance.
$number． A white solid may contain one or more of several BaCl2, NaCl, $literal, $number, and CuSO4. The solid is carried out
as follows.
① sampling, add sufficient amount of water, stir fully, filter. Get white precipitation A and colorless solution B.
② in white precipitation A add acid, precipitate all dissolved, release can make lime water turbidity of colorless gas.
③ in colorless solution B add AgNO3 solution, get white precipitation, then add acid, white precipitate insoluble. Please answer the following questions.
(1) The original white solid must not contain _________________; it must contain ______________.
(2) The solute contained in the colorless solution B obtained by the experimental ① is _______________________.
(3) The original white solid may contain ________________________________________
$number． X is known to be poisonous and insoluble in water, Y is a gas that does not support combustion, Z is a solid that is insoluble in water, and the transformation between x, Y, Z is as follows. Please answer the following questions.
(1) Write x chemical type
___________________________________________;
(2) write the chemical equation of z and acid reaction to generate Y: ___________________________
初中化学推断题专辑有答案(Junior chemistry deduction question album has an answer)
