Why are colloidal particles charged and colloids uncharged? There is also the definition of colloida

The colloid itself is electrically neutral, like all solutions, so it is not charged.

Colloidal particles refer to colloidal adsorption of dispersion systems.

After the charge of the particles, due to the large surface area of the colloidal particles.

The adsorption capacity is strong, and the adsorbed ions are tightly bound to it and it is difficult to separate, so the charged colloids in the colloid can exist stably. So, colloidal particles have an electric charge.

Colloidal particles are positively charged if they are adsorbed.

It is positively charged, such as ferric hydroxide colloids.

Particle; If the adsorption is negatively charged, it has a negative charge, such as colloids formed by some non-metallic oxides, soil colloids, and so on.

The charge of the colloids can be either adsorption or ionization. Such as silicic acid.

In the sol, colloidal particles are formed by the condensation of many silicic acid molecules, and the silicic acid molecules on the surface can ionize H+, leaving SiO32- and HsiO3- ions on the surface of the colloidal particles, and making the silicate particles negatively charged.

The particles present in the colloid are called micelles, and colloids are made up of micelles. The micelle is composed of a colloidal core, an adsorption layer, and a diffusion layer. The colloidal nucleus is formed by the aggregation of many molecules or other particles, it has strong adsorption capacity, and there is an electric double layer on the periphery of the colloidal core.

i.e. adsorption layer and diffusion layer. In layman's terms, after the core adsorbs ions with a certain charge, colloids are formed, and the charged particles can further adsorb oppositely charged ions. Among them, the ion layer in the colloidal particles is called the adsorption layer, and the ionic layer readsorbed by the colloids is called the diffusion layer.

This is caused by the fact that the dispersion of the colloidal particles and the dispersions of the colloids have an equal amount of dissimilar charge. The colloid consists of two parts, colloids and dispersions, so the colloids are not charged.

Electric charge is a positively charged or negatively charged particle carried by an object or a particle that constitutes an object, and a positively charged particle is called a positive charge.

The symbol is "+" Spring Mountain), and the negatively charged particles are called negative charges (the symbol is " " is also some elementary particles.

such as electrons), the same charge repels each other, and the different charges attract each other.

in electromagnetism. Charge (diàn hè) is also a physical property of matter.

A substance with an electric charge is called an "electrically charged substance". Two charged substances will exert a force on each other, and they will also feel the force exerted by the other, and the force involved obeys Coulomb's law.

There are two types of electric charges, "positive charge" and "negative charge". Substances that have a positive charge are called "positively charged"; Substances that have a negative charge are called "negatively charged". If both substances are positively charged or negatively charged, they are said to be "homoelectric", otherwise they are said to be "heteroelectric".

Two homoelectric substances will feel the repulsive force exerted by each other; Two heteroelectric substances will feel the attraction exerted by the other in the middle of the cut. The same charge repells each other, and the different charges attract each other.

Electric charge is a fundamental conservation property possessed by many subatomic particles. Charged particles are called "charged particles". The charge determines the physical behavior of charged particles in terms of electromagnetism.

Charged particles at rest create an electric field, and moving charged particles produce an electromagnetic field.

Charged particles are also affected by electromagnetic fields. The interaction between a charged particle and an electromagnetic field is called an electromagnetic force.

or electromagnetic interactions. This is one of the four basic interactions.

The above content reference: Encyclopedia - Charge

Glad you stupid question The landlord needs to understand the properties of the colloid itself, first of all, we need to make it clear that colloids are mixtures, and they are one of the dispersion systems, and the dispersion systems are divided into dispersions and dispersions, and the dispersions of colloids are colloids. In fact, the so-called dispersion is the substance distributed by the dispersion, and the dispersion is the substance dispersed by the dispersion, for example, the solution is divided into solute and solvent, and the particles of the solute are dispersed by the solvent, so the solvent is the dispersion of the solution, and the solute is its corresponding dispersion, I believe that you will understand. The reason why it is said that the colloids are not charged and the colloids are charged is because the dispersions dispersed by the colloids and the gels have an equal amount of dissimilar charge.

The colloid consists of two parts, colloidal particles and dispersions, so the colloids are not charged, but the gels are indeed charged. Like you can say that the solute particles in the solution are charged, but the solution is not. (Of course, most of the solute particles here are positively charged and some negatively charged, but the overall apparent charge is due to the neutrality) The reason why the colloidal particles are charged is because the colloidal particles are formed by the aggregation of several dispersed particles, and then the ionization is caused by the outward adsorption of ions by the charge, under normal circumstances, metal hydroxides are easy to adsorb positive charges and metal sulfides are easy to adsorb negative charges.

These are some regularities, and only memory is needed in middle school, especially the soil colloids are negatively charged. Of course, there are also some colloids that are formed due to their own macromolecules, in fact, there is no adsorption phenomenon, so this kind of colloids themselves are not charged, such as starch colloids I don't know if I explained clearly, if necessary,

Question 1: colloidal particles are charged, but colloids are electrically neutral, why simply put, because the particle size is small, the surface area is large, the surface atoms are easy to adsorb some charged groups to make it charged, as for the positive charge is related to the particle material, in order to maintain the charge balance, there are corresponding cations or anions in the colloidal solution to make the colloidal solution neutral.

Question 2: Why are colloidal particles charged, and where does the bond charge come from Colloidal particles have a large surface area that can adsorb anions or cations, resulting in electrification of colloidal particles.

1. The gel particles have an electric charge.

2. Different colloids adsorb ions with different charges with different charges. Generally speaking, the colloidal particles of metal hydroxides and metal oxides adsorb cations, and the colloidal particles are positively charged; The colloidal particles of non-metallic oxides and metal sulfides attract anions, and the colloidal particles are negatively charged.

When a small amount of electrolyte solution is added to the colloid, the cation or anion added will neutralize the charge carried by the colloidal particles, and then the colloidal particles will accumulate into larger particles and form a precipitate. Similarly, coalescence occurs when colloidal particles with opposite charges are mixed. Heating can also cause colloids to coalesce.