or sodium bicarbonate
crystals tend to be small and white. Sometimes they can look a little like
frost or icing when grown on a string. Here's how you grow baking soda crystals
MATERIALS FOR BAKING SODA CRYSTALS
Pencil or butter knife (to hold the
string over the glass)
PREPARE THE CRYSTAL CONTAINER
You want to hang the string in the
glass or jar so that it doesn't touch the sides or bottom of the container.
Tie the string to the pencil or
knife, weight it so it will hang straight, and adjust the length of the string
so that it doesn't touch the bottom of the container.
PREPARE THE CRYSTAL SOLUTION
Mix as much baking soda as you can
into just-boiled water. For 1 cup of water, this is approximately 7 teaspoons
of baking soda. Add the baking soda a little at a time, stirring between
additions, because carbon dioxide gas will be evolved, causing the solution to bubble
initially. Alternatively, heat baking soda and cool water until it is
near-boiling. Allow the solution to sit undisturbed for a few moments to allow
any undissolved baking soda to sink to the bottom of the cup.
GROW BAKING SODA CRYSTALS
Pour the baking soda solution into
the container. Avoid getting undissolved baking soda in the glass.
You may wish to cover the container
with a coffee filter or paper towel to keep the solution clean while permitting
Allow the crystals to grow as long as
you like. If you start to see a lot of crystal growth on the sides of the
container rather than on your string, pour the remaining solution into a new
container. Transfer your string to the new container to get better growth.
When you are satisfied with your
crystals you can remove them from the solution and allow them to dry.