Concept explainers
Interpretation:
An experiment needs to be designed to grow a crystal in laboratory.
Concept introduction:
A crystal grows in two distinct stages. At first a small nucleus of the crystalline material is formed. This step is very slow as the ionic components must align themselves in the right orientation for the nucleus to form. The second stage is faster and the crystal grows outward with the rate of growth.
Answer to Problem 131A
In the crystal growth, there are two important factors. The ionic material should have high solubility in a solvent when it is warm and solution should be left untouched for several days.
Explanation of Solution
Common table salt that is sodium chloride is a good material to grow crystal in laboratory. In this process first add sodium chloride to water until it reaches a point where all salt cannot dissolve in water. After that, heat the solution till the salts are completely dissolved. This produces a supersaturated solution of sodium chloride. Next, cover the mouth of the container and leave it without touching or moving it for several days. After few days, cube like crystals of sodium chloride should be found.
Chapter 7 Solutions
Chemistry: Matter and Change
Additional Science Textbook Solutions
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