what is bicarbonate of soda

Bicarbonate of soda, also known as baking soda, is an alkaline leavening agent that is commonly used in baking to help batter rise. It is often used in recipes that mix moisture plus an acidic ingredient (such as lemon juice, chocolate, buttermilk, or honey) together to make batter rise. Bicarbonate of soda gives off carbon dioxide, which expands in a mixture, and once the mixture is cooked, the carbon dioxide is replaced by air, leaving a light cake or bread. Baking powder is bicarbonate of soda pre-mixed with a dry acidic ingredient (such as cream of tartar) that causes baking to rise when mixed with wet ingredients. Bicarbonate of soda can also be used for cleaning and other household purposes. It is important to note that bicarbonate of soda has a tangy flavor if overused, so it should be sifted very well.