Sodium hydrogen carbonate is commonly called sodium bicarbonate or baking soda.

Question

Sodium hydrogen carbonate is commonly called sodium bicarbonate or baking soda. When combined with an acid and heated it releases carbon dioxide gas, which is responsible for the rising of cookies, some doughnuts, and cakes.

a. My mother’s recipe for sugar cookies requires baking soda and buttermilk. The acid in buttermilk is lactic acid. Write a balanced chemical equation for the reaction of lactic acid and sodium hydrogen carbonate.

b. My mother’s recipe for sugar cookies makes 30 cookies and requires one teaspoon of baking soda. Assume buttermilk is in excess. Calculate the volume of carbon dioxide produced per cookie by heating at 350 oF for 15 min at 0.98 atm.

c. Does each cookie expand in volume by the amount calculated in part a? Explain your answer.

d. Ammonium hydrogen carbonate has also been used for the same purpose. Suggest one advantage and one disadvantage of using ammonium hydrogen carbonate instead of sodium hydrogen carbonate.

Explanation / Answer

Sodium hydrogen carbonate is commonly called sodium bicarbonate or baking soda.

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