[Chemistry Class Notes] on Crystals Salt Pdf for Exam

It is exciting to run experiments and view changes in chemical structures of objects around. The crystal making process is another exciting experiment that high school students can practice in labs and learn more about science. 

Apparatus

Like any other experiment, this experiment on crystal making with salts also requires some apparatus. The apparatus required for making crystals with salt is specified below:

• 2 toothpicks

• A pair of scissors

• 1 jar

• Some water

• A string

Result

After observing for some time, the solution settles for a while and then salt crystals are formed along the strings. On observing more closely, students can see the difference between microbes that are present in them, their shape and colour, and how they are formed. The size of the crystal form will also differ such as small crystals and large single crystals. Many other observations can be made with a microscopic view of these crystals

How to Make Crystals Out of Salt?

The steps for preparing crystals from salts are specified below.

1. The first step is to heat the water of 120 ml in a pan until it starts bubbling.

2. The next step is to add Epsom or even alum for quicker results

3. The heated pan is taken off the heat and to which 60-120ml of salt is added.

4. Stirring the solution is important here so that the salt can dissolve and becomes a supersaturated solution.

5. Pouring this solution into a clean glass jar till the undissolved salt grains of the solutions also falls into the new jar.

6. The next step is to add food colour to the new jar.

7. Using a pencil, tie a string to it. The pencil has to remain balanced on top of the jar so that the string dangles easily into the water.

8. Once you put the jar into a safe place and wait for some time, you will observe the formation of crystals on the string submerged in the water.

How to Prepare Crystal Salts?

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Follow the steps mentioned below to experiment on how to make crystals out of salt.

1. A container is required that is flat, shallow, and wide.

2. Distilled water along with alum salt or table salt is added to this container.

3. This solution is kept for rest for some time.

4. After some days, a thin layer of small crystals could be easily observed forming at the base of this solution. 

5. Using a pair of tweezers, select a seed crystal after pouring out the liquid.

6. The next step involves attaching a smooth wire or fishing line to one side of the crystal.

7. Now make a new solution with the same salt that was used earlier.

8. This salt solution is then transferred into a clean jar where the seed crystal is placed very delicately without touching both and/or sides of the jar.

9. Cover this new jar with filter paper to protect it from dust. Do not use an airtight lid.

10. To remove impurities, keep pouring the solution through a filter paper every week.

11. After some weeks have passed by, you can take this newly formed crystal out and dry it. This crystal can further be protected by a layer of nail polish which prevents it from wearing off.