Quick Answer
Baking Soda does not use the same grams-to-cups value as every other ingredient. Using a practical US cup reference, 230 grams of baking soda is about 1 cup.
That means 100 grams of baking soda is about 0.43 cups, while 200 grams is about 0.87 cups.
Baking soda is a fine alkaline powder used as a leavening agent. Like baking powder, it is typically measured in teaspoons, not cups.