Information about Make your own crystals with Fizzics Education | Kids Science Experiments

Make your own Crystals

Make your own Crystals

Follow FizzicsEd 150 Science Experiments:

You Will Need:

Adult help

Three cups of table salt.

1L of water

One Pencil

1 Paperclip

A piece of string, cut to size.

One strong plastic or Pyrex jar.

Grow Salt Crystals science experiment - materials needed
1

Boil the water with the help of an adult.

Pour the water into the plastic jar. Do not use glass as it may break.

2 Grow Salt Crystals science experiment - adding salt

Add the salt one table spoon at a time. Allowing the salt to dissolve before you add more table spoons.

Continue adding salt until you cannot dissolve anymore and it collects at the bottom of the jar.

3 Grow Salt Crystals science experiment - salt crystal growing

Tie one end of the string around the pencil and the other end around the paperclip.

Dangle the string into the saturated salt solution, so that the paperclip doesn’t touch the bottom of the jar or its sides.

4

Allow the jar to sit undisturbed for one week. Salt crystals should form at the top of the string

Why Does This Happen:

The crystals could only stay dissolved when the water was hot. Cooling the solution down made it supersaturated, which is unstable. You should have found that the water travelled up the string through a process called capillary action, bringing the salt with it. As the water evaporated on the string, salt crystals were left behind.

A supersaturated solution is a solution that has more material dissolved in it then it would normally allow.

Find out more about capillary action on the external site USGS Water Science.

Learn more!

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