That explains why solid drugs are often formulated into solutions before chemical reactions are carr

Many solid pharmaceutical products are composed of ions, which are formulated into solutions and ionized ionization to carry out chemical reactions.

The reason is as follows:

1. Homogeneous phase liquid preparation, the drug is dispersed in the liquid dispersion medium in the form of molecules and ions, such as low-molecular solubility stool eggplant liquid and polymer solution.

2. Inhomogeneous phase liquid agent, the drug is dispersed in the liquid dispersion medium in the form of particles or droplets, such as sol agent, suspension agent, emulsion, etc.

(1) The drugs in the laboratory are stored in the reagent bottle, the solid drugs are stored in the jar, the powder solid drugs should be used with a medicine spoon, and the block solid should be used with tweezers During the experiment, attention should be paid to saving drugs, and the drugs should be taken in strict accordance with the dosage specified in the experimental instructions If the dosage is not specified, the minimum amount should generally be taken and covered with the bottom of the test tube

2) Liquid drugs are usually stored in fine-mouth bottles, the reagent bottle cap is placed upside down on the table, the label is facing the palm, and the reagent bottle mouth is poured next to the container mouth, if the dosage is not indicated, take a minimum amount of 1-2ml

So the answer is: jars; medicine spoons; Tweezers; Cover the bottom of the tube; Fine-mouthed bottles; Pour; Palm; 1-2．

Solid drugs are usually stored in jars, powder granules are generally taken with a medicine spoon, and blocks are taken with tweezers, if the dosage is not stated, the minimum amount should be taken, the solid only needs to be covered with the bottom of the test tube, and the liquid drugs are usually stored in a fine-mouth bottle, and the reagent bottle cap is placed upside down on the table when taking it, the label is facing the palm, and the reagent bottle mouth is poured next to the container mouth, if the dosage is not specified, the minimum amount of 1-2ml is taken

So the answer is: jars; medicine spoons; Tweezers; Cover the bottom of the tube; Fine-mouthed bottles; Pour; Palm; next to each other; 1-2．

C False: If you know that NaHs is alkaline, it is easy First of all, OH- is greater than H+NaHS solution, and there are the following 4 situations.

Nahs=Ionization=Na+ +Hs-, Na+ completely ionized HS- is also completely ionized, but a very small part of it is hydrolyzed.

Hs- +H2O = Hydrolysis Reversible = H2S +Oh- Because the amount of Hs- hydrolysis is small, so the amount of Oh- is also small.

Hs-= ionization reversible=H+ +S2- The degree of ionization in the second step of H2S is very, very smallH2O= Reversible ionization=H+ +OH- The degree of ionization is also very weak, so that Na+ is greater than Hs- greater than OH- greater than H+ greater than S2- If you don't know that NaHs is alkaline, you can calculate it according to K1=,K2= by kw=k ionization xk hydrolysis of H2S aqueous solution.

The amount of oh- produced by hydrolysis is greater than the amount of H+ produced by ionization.

Hydrolysis is greater than ionization and alkaline.

The judgment d is correct.

The principle is the same as that of C, the ionization of NaAC is the most important mass, and the concentration of AC- is much greater than that of OH-.

Answer]: The test point of this question is the classification of liquid preparations. Solution-type liquid agent is a clear and clear solution of the drug dispersed by molecules or ions; Polymer solution-type liquid drug Zheng Ludan is a clear solution in which the drug is dispersed by molecules or ions; Sol agent is a heterogeneous system formed by the dispersion of drugs in multimolecular aggregates; The suspension type liquid agent is a multiphase system formed by the dispersion of solid particles by drugs; Emulsion-type liquid agent is a heterogeneous system formed by the dispersion of liquid particles in the drug.