Chemistry, asked by Shatakshi3, 1 year ago

explain the process of crystallisation.

Answers

Answered by Aghaz
7
Crystallization occurs in two major steps. The first is nucleation, the appearance of a crystalline phase from either a supercooled liquid or a supersaturated solvent. The second step is known as crystal growth, which is the increase in the size of particles and leads to a crystal state. An important feature of this step is that loose particles form layers at the crystal's surface lodge themselves into open inconsistencies such as pores, cracks, etc.

The crystallization process consists of two major events, nucleation and crystal growth which are driven by thermodynamic properties as well as chemical properties. In crystallization Nucleation is the step where the solute molecules or atoms dispersed in the solvent start to gather into clusters, on the microscopic scale (elevating solute concentration in a small region), that become stable under the current operating conditions. These stable clusters constitute the nuclei. Therefore, the clusters need to reach a critical size in order to become stable nuclei. Such critical size is dictated by many different factors (temperature, supersaturation, etc.). It is at the stage of nucleation that the atoms or molecules arrange in a defined and periodic manner that defines the crystal structure — note that "crystal structure" is a special term that refers to the relative arrangement of the atoms or molecules, not the macroscopic properties of the crystal (size and shape), although those are a result of the internal crystal structure.
Answered by Suryavardhan1
6
 \huge{HEY!!}
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✔The process of crystallization is used to purify a solid from its impurities.

✔First of all, we take about 5 gram of impure sample of copper sulphate in a China dish.

✔After that, we dissolve it in minimum amount of water then filter the impurities.

✔Saturate the solution by heating that is when some solid starts evaporating.

✔Then we cover the solution with filter paper and leave it undisturbed to cool slowly for a day.

✔Hence, by this process we will obtain the crystals of copper sulphate in a China dish.
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