You are here
Diana prepared a cake by two methods.
Method i) She added baking soda to the cake mixture and let the mixture stand for one hour before placing it in the oven to bake.
Method ii) She added baking powder to the cake mixture and let the mixture stand for one hour before placing it in the oven to bake.
State the difference in the cake mixtures that Diana is likely to have observed before baking. Explain why.
Answer:
Diana will see that cake mixture (ii) has risen while cake mixture (i) has not .
Cake mixtures rise due to the production of carbon dioxide when sodium bicarbonate reacts with tartaric acid after mixing with each other.
- Baking soda does not contain tartaric acid and hence cannot not produce carbon dioxide before baking.
- Since baking powder contains tartaric acid , it is able to make the cake mixture rise.
