What is the main cause of the charge?


What is the main cause of the charge?

The cause of charging a body is due to the transfer of electrons happening in our body. A body can induce charge from a charged body when comes in contact or may be in vicinity. Moving of electrons from one place to another can create a charge thus causing a charge on the body.

What is the charge on colloidal particles?

Colloidal particles adsorb ions and thus becomes electrically neutral.

Why do colloidal particles always carry an electric charge?

Section A ead the given passage and answer the questions 1 to 5 that follow: Colloidal particles always carry an electric charge. The origin of the charge on the sol particles in me cases is due to the preferential adsorption of either positive or negative tons on their surtace.

How do colloids acquire electrical charges?

The particles of a colloid selectively absorb ions and acquire an electric charge. All of the particles of a given colloid take on the same charge (either positive or negative) and thus are repelled by one another.

What is the origin of electric charge?

Positive and negative values of charge were originally assigned by the American statesman and inventor Benjamin Franklin, who started studying electricity in 1742. Until then, most people thought that electrical effects were the result of mixing of two different electrical fluids, one positive and one negative.

What is the cause of stability of colloidal solution?

A colloid is stable if it does not get coagulated easily. – The dispersed phase and dispersion medium have charges present on them. Colloidal particles form a sheath of charge on themselves thereby preventing any attraction between opposite charges. These colloids are quite stable as they are extensively solvated.

Which is the positively charged colloid?

Haemoglobin (blood) is the positively charged Gold sols, clay and As2S3 are the examples of negatively charged sols.

Do colloidal particles always carry charge?

The origin of the charge on the sol particles in most cases is due to the preferential adsorption of either positive or negative ions on their surface. The other factors responsible could be dissociation of surface molecules and frictional electrification.

What will be the nature of charge on colloidal particle when official 3 is added to excess of hot water?

If FeCl3 is added to excess hot water, a positively charged sol of hydrated ferric oxide is formed due to the adsorption of Fe3+ ions.

Why is electron negatively charged?

Electric charge is a physical property of matter. It is created by an imbalance in a substance’s number of protons and electrons. The matter is positively charged if it contains more protons than electrons, and it is negatively charged if it contains more electrons than protons.

What causes an electric charge on a colloidal particle?

The dissociation of surface molecules leads to electric charge on colloidal particles of the sol. For example, Consider an aqueous solution of soap (sodium palmitate) which undergoes dissociation into ions. The cations (Na +) pass into the solvent.

Why is electrolyte always present in a colloidal solution?

This gives stability to the sol. The dispersion medium carries the opposite charge, hence as a whole, the colloidal solution is electrically neutral. A small quantity of electrolyte is always present in the colloidal dispersion. Its presence is necessary for the stability of the sol, as complete removal of the sol causes coagulation of the sol.

How is electrophoresis used to detect charge on colloidal particles?

Electrophoresis is used to detect the nature of charge on colloidal particles. It is used in the removal of carbon particles from chimney gases. It is used in electro-deposition of rubber on metal, wood or cloth surfaces from latex.

Which is the most important property of a colloidal solution?

The most important property of colloidal solution is that all suspended particles possess either positive or a negative charge. i.e. they carry the same nature of the charge. The mutual forces of repulsion between similarly charged particles prevent them from aggregating and settling under the action of gravity.

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