Baking soda needs an acid in the recipe in order to work. Which of these ingredients would react with the baking soda to make the cake fluffy? There may be more than one.
Yogurt (pH ≈ 4.42)
Buttermilk (pH ≈ 4.77)
Coffee (pH ≈ 5.03)
Water (pH = 7.00)
Eggs (pH ≈ 7.34) pls help