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Category: chemistry

Here you can see random topics related to chemistry.

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What is Hardy-Schulze rule ?

Hardy-Schulze rule It has two postulates (i) The ions which carry charge opposite to the particles of sol are more effective in causing the coagulation of the solution. (ii) Coagulating power of an electrolyte is directly proportional to the fourth power of the valency of the ions causing coagulation.

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What is peptization ?

The process of converting a precipitate into a colloidal solution by shaking vigorously with a small amount of electrolyte. The electrolyte used here for creating a colloidal solution is called the peptising agent .

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What is electrophoresis?

When electric potential is applied across two platinum electrodes which are dipped in a colloidal solution, the colloidal particles move towards the electrodes. This movement of particles on application of electric potential is called electrophoresis.

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What are Multimolecular and Macromolecular colloids?

Multimolecular colloids are formed when the molecules of dispersed phase aggregate to make a molecule which is having the size between 1nm to 1000nm. The point to note here is , the particles of colloidal solution were of molecular size which joined to make Multimolecular system. Macromolecular colloids are the substances in which the size of particles is 1nm to […]

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Why the electron affinity or electron gain enthalpy of Chlorine is higher than Fluorine ? Even if Fluorine is most electronegative element.

Even if the Fluorine is most electronegative element still its electron gain enthalpy is lower than Chlorine. In case of Fluorine the size of valence shell is so small that the upcoming electron experiences repulsions so it is not practically easy for Fluorine to gain an electron as compared to Chlorine. On other hand in case 9f Chlorine the outer […]

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What are Colligative properties ?

Actually the word co-ligative itself reveals that (“co” means each other and “ligative” means related) These are the properties which are related to each other. The colligative properties are those properties that depend on the number of solute particles in a solution or a mixture. “These properties don’t depend upon the nature of particles “. Following are the colligative properties:- […]

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Why are the noble gases chemically inert?

The outer or valence shell of these elements is complete. And they need not to make any bond. They do not share or transfer the electrons . Due to fully filled orbitals, Their ionisation enthalpies are also very high. So removing an electron from them is also very difficult. The examples of these are Helium, Neon, Argon, Krypton , Xenon […]