Table Salt Crystals

We also made coloured salt by adding a little food colouring.

Table salt crystals.

Iodized salt won t work as well but will still form crystals. Table salt also known as sodium chloride is a crystal a symmetrical solid substance made entirely of the same material. Buy it at a pharmacy. Epsom salt grows into smaller needle like crystals but grows more quickly than table salt.

Alum grow quickly sometimes making visible crystals within a few hours. Salt in its natural form as a crystalline mineral is known as rock salt or halite salt is present in vast quantities in seawater where it is the main mineral constituent the open ocean has about 35 grams 1 2 oz of solids per liter of sea water a salinity of 3 5. You can see the shape of a salt crystal under a microscope and you can grow your own salt crystals for fun or for a science fair. This activity and more salt science experiments can be found in an salt science activity sheet made as part of a collaboration with the primary science teaching.