Noun. 1. sal soda – a sodium salt of carbonic acid; used in making soap powders and glass and paper. soda, soda ash, sodium carbonate, washing soda. salt – a compound formed by replacing hydrogen in an acid by a metal (or a radical that acts like a metal)Click to see full answer. Similarly, it is asked, is washing soda and baking soda same?The difference between baking soda and washing soda is water and carbon dioxide. Baking soda’s chemical makeup is NaHCO3 (1 sodium, 1 hydrogen, 1 carbon, and 3 oxygen molecules). Washing soda’s chemical makeup is Na2CO3 (2 sodium, 1 carbon, and 3 oxygen molecules).Subsequently, question is, what is washing soda Where can I buy it? Grocery or big box stores. It’s usually in the laundry aisle next to all the laundry boosters. Pool cleaner aisle. The brand name is AquaChem. Just make sure the only ingredient listed is sodium carbonate! Online sources. You can also find it at Amazon. Besides, what is the chemical name for washing soda? Sodium carbonate What is another name for washing soda?Washing soda or soda ash are common names for Sodium Carbonate (Na2CO3).