What are the requirements for the label on the reagent bottle after the solution has been prepared

After the solution is prepared, a label should be attached to the reagent bottle. The label should indicate the name of the solution and the mass fraction of the solute.

After the prepared reagent is loaded into the reagent bottle, the shape of the branch should be labeled with a label that contains () aPreparer.

b.Preparation time.

c.Preparation method:

d.Name of the reagent.

e.Reagent concentration.

Correct Answer: Preparer; Preparation time. Name of the reagent. Reagent concentration.

Summary. There are two ways to obtain a standard solution, one is to prepare it directly with a reference material, and the other is to calibrate it with a reference material or a standard solution of known accurate concentration.

The chemical reagent of the highest purity used to prepare or calibrate the concentration of a standard solution is called a reference reagent or reference material, and a solution of known accurate concentration prepared from a reference reagent or reference material is called a standard solution.

Clean and dry reagent bottles + be sure before filling the standard solution.

Hello, the standard solution in the reagent bottle should be shaken well before filling the standard solution.

There are two ways to obtain a standard solution, one is to prepare it with the reference substance straight solanum dust back, and the other is to use the reference material or a standard solution of known accurate concentration to calibrate it. The chemical reagent of the highest purity used to prepare or calibrate the concentration of the standard solution of the brother is called a reference reagent or reference substance, and the solution of a known accurate concentration prepared from a reference reagent or reference material is called a standard solution.

Name: Concentrated sulfuric acid.

Concentration (if in solution): 98%.

Chemical formula H2SO4

Preparation date (generally not written) x year x month x day.

There is no fixed format for opening the eye, but it should generally include the following items:

1. The name of the reagent (the main chemical component).

2. Deficit content (or concentration).

3. The preparation time of Xikong Ling.

(1) Prepare 100 grams of sodium chloride solution, first calculate the amount of sodium chloride and water required through calculation, then weigh the sodium chloride with a balance, put it into a beaker, take water with a graduated cylinder and pour it into the beaker, stir with a glass rod, that is, dissolve, and finally bottle and store; Hence the answer:

2) The instruments needed to prepare the solution: beakers, tray balances, glass rods, graduated cylinders, medicine spoons and rubber tip droppers, so the answer:

3) If the balance pointer is on the right, it means that the quality of salt is less than the required quality, and the medicine should be added; So the answer: add table salt to the left plate;

4) The upward reading is less than the actual volume of the liquid, so the mass of the prepared solution is on the large side, so the answer: on the small side

(1) The basic steps of preparing a solution with a certain solute mass fraction: calculation, weighing, dissolving, bottling and storage So the order is

2) The glass instruments to be used in the dissolving operation are: glass rod and beaker, the role of the glass rod in the experiment is to stir and accelerate the dissolution of solids;

3) When measuring a given volume of liquid, if you look up at the reading, it will cause the actual liquid volume to be larger than the required volume, the solvent mass is large, the solution mass is large, and the solute mass fraction is small

So the answer is: (1).

2) glass rods; Beaker;