Chemistry Elementary Questions, Chemistry Problem Answers

1) There are bubbles generated.

2) Sodium chloride solution.

3) NaCl crystal compounds.

4) NaHCO3+HCl=NaCl+H2O+CO2 silver nitrate. A white precipitate is generated.

Good beginner, the basic knowledge is not good, it is recommended that you read more books, memorize common sense points, so that I believe you will have a quick improvement....

1. Baking soda (NaHCO3) can be used for gastric diseases (excessive gastric acid, the main component of gastric acid is hydrochloric acid), and they undergo chemical reactions to produce sodium chloride (NaCl), water and carbon dioxide.

1）.Add dilute hydrochloric acid dropwise to the baking soda flakes, and you can see that ( Air bubbles are produced on the baking soda flakes, and the baking soda flakes are gradually dissolved. ）

2）.Baking soda and hydrochloric acid react completely, and the resulting liquid is ( sodium chloride solution );

3）.This solution is evaporated to give (sodium chloride solids). The substances formed in this reaction are all (compounds) [fill in the elemental matter or compound];

4）.The above reaction is expressed by the chemical formula (NaHCO3+HCl==NaCl+CO2+H2O).

2. To test whether the water contains sodium chloride, you can add (agno3 solution) reagent, and the phenomenon is (white precipitate).

I'm dizzy, you should read more.

This question seems familiar, hehe].

But I forgot, hey.

Summary. Chemistry is a type of natural science. Chemistry is a science that studies the composition, properties, structure and changes of matter at the molecular and atomic levels.

Different from particle physics and nuclear physics, which study the smaller scale, the material structure of atoms, molecules, ions (groups), chemical bonds, intermolecular forces and other interactions are studied in chemistry, and the scale in which they are located is the closest to the macroscopic in the microscopic world, so their natural laws are also most closely related to the physical and chemical properties of matter and materials in the macrocosm of human existence. As an important bridge between the microscopic and macroscopic material worlds, chemistry is one of the main methods and means for human beings to understand and transform the material world.

Chemistry Questions Answered.

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Chemistry is a type of natural science. Chemistry is a science that studies the composition, properties, structure and changes of matter at the molecular and atomic levels. Different from particle physics and nuclear physics, which study the smaller scale, the material structure of atoms, molecules, ions (groups), chemical bonds, intermolecular forces and other interactions are studied in chemistry, and the scale in which they are located is the closest to the macroscopic in the microscopic world, so their natural laws are also most closely related to the physical and chemical properties of matter and materials in the macrocosm of human existence.

As an important bridge between the microscopic and macroscopic material worlds, chemistry is one of the main methods and means for human beings to understand and transform the material world.