Chemistry is related to colloids, and the definition of colloids in chemistry is obtained

The colloids move towards the cathode, indicating that the colloids are positively charged. This colloidal particle will coalesce and settle with other negatively charged ions or colloids.

Among the common colloids, the positively charged colloids are: metal hydroxides, metal oxides, such as Al(OH)3, Fe(OH)3 colloids.

Negatively charged are: non-metallic oxides, metal sulfides, silicic acid and soil, such as H2SiO3, As2S3 colloids, and starch colloids are not charged.

In the option, the sucrose solution is neutral, and the iron hydroxide colloidal particles are positively charged and do not coalescerate.

There are a large number of negatively charged sulfate ions in the magnesium sulfate solution, and the silicate colloidal particles are negatively charged, and they will all coalesce and sink after mixing. Pick B.

The movement of its colloids towards the cathode indicates that the colloid is positively charged, (1) it is not an electrolyte solution, and (4) it is positively charged, which is the same as the electrical properties of the original colloid.

So choose B

When a certain colloid is electrophoresis, its gel particles move towards the cathode. If the following substances are added to this colloid, the one that does not accumulate and settle is (b).

1) Sucrose solution (2) Magnesium sulfate solution (3) Silicic acid colloidal (4) Ferric hydroxide colloid A (1) (3) B (1) (4) C (2) (3) D (3) (4).

1) It is a non-electrolyte.

4) It is the same type of colloid as the colloid - during electrophoresis, its particles move towards the cathode.

Definition: Dispersion systems with a diameter between 1 nanometer and 100 nanometers are called colloids.

Colloid, also known as colloidal dispersion Qingbei, is a homogeneous mixture in which two different states of substances are contained, one dispersed and the other continuously destroyed. The diameter of colloidal particles is generally between 1 nanometer and 100 nanometers, which determines that colloidal particles have a huge surface area and strong adsorption power, which can adsorb suspended solids or pigments in water to form precipitation, so as to purify water.

Ferrohydroxide colloid, aluminum hydroxide colloid, silicon curic acid colloid, starch colloid, protein colloid, soybean milk, fog, ink, paint, silver iodide colloid, silver sulfide colloid, colored glass, jelly, egg white, blood, etc. Colloids don't have to be gelatinous and they don't have to be liquids. Such as:

Iron hydroxide colloids, clouds, fog, etc. <

Common colloids include ferric hydroxide colloid, aluminum hydroxide colloid, silicate colloid, starch colloid, protein colloid, soybean milk, fog, ink, coating, silver iodide colloid, silver sulfide colloid, colored glass dust glass, jelly, egg white, blood, etc.

Colloid, also known as colloidal dispersion, is a relatively homogeneous mixture, in which the colloid contains two different states of substance, one dispersed phase and the other continuous phase. A part of the dispersed matter is composed of tiny particles or droplets, and the dispersion system of the dispersed particles between 1 100 nm in diameter is colloid; Colloids are a kind of dispersion systems with a diameter of dispersed particles between the coarse dispersion system and the solution, which is a highly dispersed multiphase heterogeneous system.

Colloids don't have to be gelatinous and they don't have to be liquids. Such as: iron hydroxide colloid, clouds, fog, etc.

Common colloids include iron hydroxide colloid, aluminum hydroxide colloid, silicate colloid, starch colloid, protein colloid, soybean milk, fog, ink, paint, silver iodide colloid, silver sulfide colloid, colored glass, jelly, egg white, blood, etc.

Colloid, also known as colloidal dispersion, is a relatively homogeneous mixture, which contains two different states of substances in the colloid, one dispersed phase and the other continuous phase. A part of the disperse is composed of tiny particles or droplets, and the dispersion system of the disperse particles with a diameter of 1 100 nm is colloidal; Colloids are a kind of dispersion system with a diameter between the coarse dispersion system and the solution, which is a highly dispersed multiphase heterogeneous system.

Gelatinous lifts don't have to be gelatinous and not necessarily liquid. Such as: iron hydroxide colloid, clouds, fog, etc.

The nature of colloids.

1) Tyndall phenomenon:

When a parallel beam of light passes through the colloid, a bright "pathway" is seen from the sideThis is formed by the scattering of light by the colloids in the colloid. In the case of a solution, the dispersed (solute) particles are too small, and when the light is irradiated, the light can be diffracted and bypass the solute, making it impossible to observe the "pathway" of light from the side

Therefore, this method can be used to distinguish between true solutions and colloids. Suspension and emulsion, because of the large diameter of the dispersion, only reflect the incident light without scattering, and the suspension and emulsion themselves do not penetrate, and it is impossible to observe the path of light.

2) Brownian motion:

The colloids in the colloid are constantly moving irregularly. The direction and rate of movement of the colloids can change at any time, making it difficult for colloidal particles to aggregate, which is one reason for the stability of colloids. Brownian motion is a phenomenon of thermal motion of particles.

This phenomenon is not unique to colloids.

3) Electrophoresis phenomenon:

Under the action of an external electric field, the colloidal particles can move directionally to the anode or cathode in the dispersant, which is called electrophoresis. The electrophoresis phenomenon indicates that the colloids are charged. The charge of colloids is due to the fact that they have a large total surface area and have excess adsorption force, which adsorbs ions.

In general, colloidal particles of metal hydroxides, metal oxides, adsorb cations, are positively charged, such as colloids and colloidal particles. Non-metal oxides, metal sulfide colloidal particles adsorb anions and have a negative charge. Such as colloids, particles of colloids.

Of course, the type of charge of the gel band in the colloid may be related to the amount used during the reaction. Colloidal particles have a negative charge when there is an excess and a positive charge when there is an excess. The colloids are charged, but the entire colloid is still electrically neutral.

The colloidal particles of the same solution have the same charge, have electrostatic repulsion, and when the colloidal particles are close to each other, they will produce repulsive force, so the colloidal is stable, which is the main and direct reason for the colloidal stability.

4) Coagulation: The process of precipitation or deposition of colloidal particles in colloids under appropriate conditions by combining with each other to form particles with a diameter greater than . If an appropriate substance (electrolyte) is added to the colloid, the colloidal particles aggregate with each other to form a precipitate.

Definition: A dispersed system of dispersed particles between 1 nanometer and 100 nanometers in diameter.

It's called colloid. Colloids, also known as colloidal dispersions.

It is a homogeneous mixed focal-derived compound that contains two different states of substances in the colloid, one dispersed and the other continuous. The diameter of colloidal particles is generally between 1 nanometer and 100 nanometers, and it breaks and determines that colloidal particles have a huge positive surface area.

The adsorption power is very strong, and it can adsorb suspended solids or pigments in the water to form a precipitate, so that the water can be purified.

The dispersed system of dispersed particles with a diameter between 10 -9 m and 10 -7 m is called colloid.

Fe(OH)3 colloidal ashwagandha.

Al(OH)3 colloid.

Silicic acid. Colloids (starch colloids.

agiag2s

as2s3 additionally.

Protein. Blood.

Beans hold a ruler to check the pulp.

Ink. Paint the skin.

Soapy water. Also colloids.