The Power of Apple Cider Vinegar for Rust Removal
.
Sodium carbonate,
Na2
CO3, (also known as
washing soda,
soda ash and
soda crystals, and in the
monohydrate form as
crystal carbonate) is the water-soluble
sodium salt of
carbonic acid.
I guess I should have said per 1 cup because washing soda is powder and ash is flakes and doesn't weigh as much