What is the formula for calculating the dilution concentration?

The formula for calculating the dilution concentration of the solution: v1 1 1=v2 2 2.

On dilution of the solution, the volume of the solution changes, but the amount of the substances of the solute in the solution does not change, i.e., before and after dilution of the solution, the amount of substances of the solution is equal. Calculation of the molar concentration of the solution:

1. The mass m of the solute is known, and the volume v of the solution, assuming that the molar mass of the solute is m, and the molar concentration of the solute is c=m mv.

2. The amount of substances known as solute n, and the volume of solution v, the molar concentration of solute is c = n v.

3. The mass fraction of the solute is known w, and the density of the solution p, the molar mass of the solute is m, and the molar concentration of the solute is c=1000pw m.

4. The mass of the solution m is known, and the volume v of the solution, the density of the solution w The molar concentration of the solute is c = 1000mw mv.

Concentrated solution (volume) Concentrated concentration = dilute solution (volume) Dilute concentration (because the solute does not change);

Dilute solution (volume) - concentrated solution (volume) = the amount of solvent you want to add.

The formula for calculating the quantity concentration of a substance.

is a formula used to calculate the concentration of a substance. The content of the formula is: the amount of solute = the amount and concentration of solute x the volume of solution n = c·v. This formula is also called Moore's Law.

The dilution theorem is a theorem proposed by William Ostwald regarding the dissociation constant and weak electrolyte.

of dissociations.

When diluting and concentrating a dilute solution of a certain concentration of a substance, the amount of solute substance remains the same. Concentration before dilution Volume before dilution = concentration after dilution Volume after dilution. Namely:

c1×v1=c2×v2。It is also emphasized that all conversions involving the concentration of substances follow this law. The principle is that the amount of the solute does not change before and after dilution.

The formula for calculating the percentage concentration of the solution: solute mass 100% of the solution mass.

The amount of the substance concentration = the amount of the substance of the solute and the volume of the solution.

20mg ml is equivalent (20mg 5700g mol) 1ml=

Concentration is defined as the amount of solute contained in a certain amount of solution, such as mass concentration is the mass of solute contained in a certain mass solution; The amount concentration of a substance is the amount of a substance containing solute in a certain volume of solution.

Commonly used concentration notations are:

Mass Percent Concentration (mass fraction, mm): Most commonly used. Refers to the mass of solute per 100 grams of solution, in grams.

Mass percentage = (solute mass (g)) solution mass (g)) 100% = solute mass (g)) (solute mass (g) + solvent mass (g)) 100%.

Percent by volume (volume fraction, v v): Commonly used in alcohol. Refers to the volume of solute per 100 ml of solution, in milliliters.

The amount of concentration of the substance.

The quantity concentration of a substance is the abbreviation of the quantity concentration of the solute in the solution, usually it is the amount of the substance containing solute B (B represents various solutes) in the unit volume to express the physical quantity of the solution composition, called the quantity concentration of the substance of solute B. The amount concentration of a substance is an important concentration notation, symbolic c(b). The commonly used unit is mol l.

The basic formula for the quantity concentration of a substance is:

c(b) n(b) v(b denotes various solutes).

Note: v is the volume of the solution, and the unit is generally l. The amount of a substance is the amount of solute substance and cannot be expressed by mass.

Any volume of solution is taken out of a solution, the concentration remains the same, and the amount of the solute contained is determined by the volume.

The solution is electrically neutral, and the total number of charges carried by the anion and cation is equal.

Please note the following points when using the dosage concentration formula of a substance:

1.The amount of solute, or mass, or volume of a substance to be taken. Therefore, it is necessary to be proficient in the conversion between the quantity of matter (mol) and the mass of matter (g) and the volume of matter (v).

2.The outstanding advantage of comparing the quantity concentration of a substance with the mass fraction of the solute in solution is that it is easy to know or compare the number of particles in the solute in the solution.

Answer: The formula for calculating the content is n=c·v. Refers to the percentage of the weight of the solute contained in the solution. When a soluble substance is dissolved in a solvent, the density of distribution in that solvent is expressed as a percentage, which is called the percentage concentration of the solution, which is often expressed as c%.

The formula for the concentration problem is:

The concentration problem formula is divided into 4 types, which are to find the mass of the solution, the concentration, the weight of the solute, and the weight of the solution, among which the most common problem is the weight of the known solution and the concentration of the solute.

Concentration Question Formula:

The weight of the solute The weight of the solvent The weight of the solution.

The weight of the solute is 100% concentrated by the weight of the solution.

The weight of the solution The concentration of the solute is the weight of the solute.

The weight of the solute concentration of the solution.

The basic formula: c=1000 m

Where: the amount and concentration of the substance in the --- unit mol l1000---1000 ml unit ml -- density unit g ml

--Mass fraction %

The molar mass of the solute --- m in g mol

The formula for calculating the concentration of the diluted solution: v1 m1 = v2 m2, v = v2 -v1.

v1 = diluted precursor volume n, v2 = volume after dilution, m1 = pre-dilution concentration, m2 = post-dilution concentration, v = total solvent dilution.

Note:

Calculation of the molar concentration of the solution:

1. The mass m of the solute is known, and the volume v of the solution, assuming that the molar mass of the solute is m, and the molar concentration of the solute is c=m mv.

2. The amount of substances known as solute n, and the volume of solution v, the molar concentration of solute is c = n v.

3. The mass fraction of the solute is known w, and the density of the solution p, the molar mass of the solute is m The molar concentration of the solute c=1000pw m.

4. The mass of the solution m is known, and the volume v of the solution, the density of the solution w The molar concentration of the solute is c = 1000mw mv.

Principle: The solute mass before dilution = the solute mass of the macrowax after dilution.

Calculation formula: mass of concentrated solution mass fraction of concentrated solution mass fraction of dilute solution mass fraction of dilute solution.

1. Formula for calculating the percentage concentration of the solution:Solubility mass 100% solution mass. where solute mass + solvent mass = solution mass.

2. Percentage concentration of solution (the concentration can be calculated by the number of grams, gram molecules or gram equivalent of solute in a certain solution. ) is the percentage of the weight of the solute contained in a solution (generally a unit solution).

3. After a soluble substance is dissolved in a solvent, the distribution density of the solvent is expressed as a percentage, which is called the percentage concentration of the solution (solution mass fraction), which is often expressed as c% (can also be expressed as w).

The formula for calculating the concentration is the amount of the substance in the solute volume of the solution.

Analysis: Usually it is expressed by the amount of solute B (B represents various solutes) contained in the unit volume to express the physical quantity of the solution composition, which is called the concentration of solute B. The amount concentration of a substance is an important notation of concentration, the symbol c(b), the concentration is calculated by the amount of the substance of the solute and the volume of the solution.

Commonly used concentration notations are:

Mass Percent Concentration (mass fraction, mm): Most commonly used. Refers to the mass of solute per 100 grams of solution, in grams.

Mass percentage = (solute mass (g)) solution mass (g)) 100% = solute mass (g)) (solute mass (g) + solvent mass (g)) 100%.

Percent by volume (volume fraction, v v): Commonly used in alcohol. Refers to the volume of solute per 100 ml of solution, in milliliters.

The formula for calculating the concentration is: concentration = mass of the solution 100% of the mass of the solution.

The amount of the substance concentration = the amount of the solute of the substance and the volume of the solution (c=n v).

The definition of degree is the amount of soluble mass contained in a certain amount of solution, such as the mass concentration is the mass of the solute contained in a certain mass solution, and the quantitative concentration of a substance is the amount of solute contained in a certain volume of solution.

Common concentration expressions:

There are three common concentration representations: mass percentage, solute percentage, and volume percentage.

1. Mass percentage concentration: mass fraction, m m, this is the most common method, which mainly refers to the mass of solute in a solution of 100 grams, calculated according to the number of grams.

2. Percentage concentration of solute: (solute mass (g)) solution mass (g)) 100% = solute mass (g)) solute mass (g) + solvent mass (g)) 100%.

3. The percentage concentration of the volume chain band: volume fraction, v v, this algorithm is often used for wine, and mainly refers to the volume of solute per 100 ml of solution, and this volume is calculated according to milliliters. <>

The basic formula for the quantity concentration of a substance is: c(b) n(b) v(b represents various solutes) weight of solute weight of solvent weight of solution.

The weight of the solute is 100% concentrated by the weight of the solution.

The weight of the solution The concentration of the solute is the weight of the solute.

The weight of the solute concentration of the solution.

Formula for calculating the concentration of the diluted solution:

v1×m1 = v2×m2

v =v2 -v1

v1 = volume n before dilution

v2 = volume after dilution.

m1 = pre-dilution concentration.

m2 = diluted concentration.

v = total solvent dilution.

The specific process of change of the solution is as follows:

1) Take 5ml of the solution and dilute it to 25ml with water

1000 g ml * 5 ml 25 ml = 200 g ml2) and then dilute 20ml to 25ml from (1).

200 g ml * 20 ml 25 ml = 160 g ml3) and then take 20 ml from (2) to dilute to 25 ml

160 g ml * 20 ml 25 ml = 128 g ml4) and then diluted to 25 ml by (3).

128 g ml * 25 ml = 64 g ml5) and then take 2ml from (4) to dilute to 10ml

64 g ml * 2 ml 10 ml = 6) by (5) take 5 ml of solution and dilute it with water to 25 ml * 5 ml 25 ml =

7) Dilute 20ml to 25ml from (6).

20ml / 25ml =

8) Take 20ml from (7) and dilute it to 25ml

20ml / 25ml =

9) Dilute to 25ml from (8).

25ml =