The amount and concentration of the substance The amount of the substance The volume Volume refers t

1 ammonia gas and 1 mol water to produce 1 mol monohydrate ammonia NH3·H2O, commonly known as ammonia, chemical name ammonium hydroxide NH4OH. Pure sodium hydroxide exists in the form of solids, while ammonium hydroxide can only exist in a large amount of water as ammonium NH4 ions and hydroxide OH ions, so there is no pure ammonium hydroxide. When the ammonium hydroxide solution is concentrated, the ammonium hydroxide is decomposed into ammonia NH3 and escaped.

When analyzing the concentration of ammonia water, it is usually hydroxide ions in the acid-base titration solution, and 1 mol hydroxide ion contains 1 molammonium, that is, 1 mol ammonia monohydrate, 1 mol ammonia gas. As for sulfuric acid, there is also no 100% pure sulfuric acid, usually 98% concentrated sulfuric acid. The preparation of concentrated sulfuric acid is obtained by dissolving sulfur trioxide in water or dilution of pyrosulfuric acid.

Sulfur trioxide is pure, pyrosulfuric acid is also pure, that is, sulfuric acid is not pure, always contain a little water, and only sulfur trioxide or pyrosulfuric acid can be pure. The quantity concentration is the amount of solute divided by the volume of solution l, and the amount of ammonium hydroxide solute divided by the volume of ammonia aqueous solution is the amount concentration of ammonia.

Pure sulfuric acid, 100% sulfuric acid is unstable, and its concentration is around 19mol l! Pure ammonia does not exist, and the solubility of ammonia in water is one volume of water dissolving 700 volumes of ammonia; The water in such a solution, in addition to the formation of ammonia monohydrate, also has a large amount of free water; And the concentration of ammonia can't be higher! So the pure ammonia you are talking about does not exist, and there is no corresponding concentration!

H2SO4 molar mass.

is 98g mol, 250ml =

Solute mass = there are two hydrogen ions in each H2SO4 molecule, so the amount of hydrogen ions is the concentration of fetish.

It is carried blind in 2mol l

The amount concentration of the substance of concentrated sulfuric acid = 1000*

Analysis of test questions].

Analysis: The mass fraction of the solute and the density of the solution are known in the question, and the volume is unknown, which can be directly calculated by using the conversion formula: c=1000

The concentration of the sulfuric acid solution (mass fraction.

There is no direct relationship with the amount of sulfuric acid, and an indirect relationship can occur through the quality of the sulfuric acid solution, when the mass of the sulfuric acid solution is constant, the greater the concentration (mass fraction) of the sulfuric acid solution, the greater the amount of sulfuric acid, and the proportional relationship.

The concentration of sulfuric acid solution (quantity concentration) is not directly related to the amount of sulfuric acid, and the indirect relationship can occur through the volume of sulfuric acid solution.

The density of sulfuric acid solution is not directly related to the amount of sulfuric acid, and the indirect relationship can occur through the mass and volume of sulfuric acid solution.

The density of sulfuric acid solution is directly related to the concentration and mass fraction concentration of sulfuric acid solution, and the different concentrations and mass fraction concentrations of sulfuric acid solution correspond to the density of a sulfuric acid respectively, which can be found from the concentration and density of sulfuric acid comparison table.

98% of the sulfuric acid solution density is, the amount concentration of the substance is, 15% of the sulfuric acid solution, the density is, the amount concentration of the substance is.

The higher the concentration, the greater the density, the density of the concentrated sulfuric acid solution and the amount and concentration of the substance can be measured and calibrated by the actual measurement and calibration, and then the actual concentration can be obtained by the formula c=1000 m, and the same is true for other strong acids.

1、naoh+hcl=nacl+h2o

NaOH + H2SO4 = Na2SO4 + 2H2O3, indicating that the amount of HCl of the same substance is not the same as the amount of NaOH of H2SO4 depletion.

4. The ratio of the volume consumed should be HCL:H2SO4=2:1, I hope it will help you, and I wish you a happy study.

The concentration of sulfuric acid solution (density = the amount of the substance is (

Set the volume to 1 ml, the concentration of the amount of the substance cb = (1 2If 50ml of the concentrated sulfuric acid is dissolved in water to obtain 500ml of dilute sulfuric acid (the volume of the solution lost in the process is not counted), the concentration of the substance of the dilute sulfuric acid solution is (

The concentration of the amount of the substance cb = (50

3.Now with 98% concentrated sulfuric acid (density = 500ml of dilute sulfuric acid with a concentration of 500ml, the required volume of concentrated H2SO4 is (

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

The amount of H2SO4 required is 500ml of dilute sulfuric acid at a concentration of 500ml

The volume of concentrated H2SO4 required is xml, then (x, x=

In the quantity concentration of a substance, volume refers to: the volume of the solution, not the volume of the solvent;

The quantity of a substance refers to: the amount of a solute, not the mass of the solute.

1 l of sodium hydroxide contained in this solution.