Question

8 baking powder needs an acidic ingredient to react. a false b true

Explanation:

Baking powder contains both an acid and a base (bicarbonate) along with a filler. However, some types of baking powder (self - rising) already have an acidic component, but in general, for the leavening reaction (production of $CO_2$), an acidic ingredient is needed to react with the bicarbonate. But actually, baking powder is formulated with an acid (like cream of tartar) and a base (sodium bicarbonate) so that when moisture is added, they react. Wait, no—wait, the statement is "Baking powder needs an acidic ingredient to react". But baking powder already has the acid in it. Wait, maybe the confusion is between baking soda and baking powder. Baking soda (sodium bicarbonate) needs an acidic ingredient to react, but baking powder has the acid (e.g., monocalcium phosphate or cream of tartar) already included. Wait, no, maybe I got it wrong. Wait, the chemical reaction for baking powder: the acid (e.g., $KH C_4H_4O_6$ - cream of tartar) and the base ($NaHCO_3$) react in the presence of water and heat to produce $CO_2$. So baking powder already has the acid, so does it need an external acidic ingredient? No. Wait, but maybe the question is misphrased. Wait, no—wait, maybe the original knowledge: Baking soda (sodium bicarbonate) requires an acidic ingredient (like vinegar, lemon juice) to react and produce $CO_2$. Baking powder, on the other hand, contains both the acid and the base, so it doesn't need an external acidic ingredient. Wait, so the statement "Baking powder needs an acidic ingredient to react" would be False? Wait, no, maybe I'm mixing up. Wait, let's recall: Baking powder is a mixture of a carbonate or bicarbonate and a weak acid. When mixed with liquid, the acid and base react to produce carbon dioxide gas. So the acid is already in the baking powder. So does baking powder need an external acidic ingredient? No. So the statement is False? Wait, but the options are A False, B True. Wait, maybe I made a mistake. Wait, no—wait, maybe the question is about the reaction: the baking powder's acid and base react, so the acid is part of the baking powder. So it doesn't need an external acidic ingredient. So the answer is A. False? Wait, no, wait, let's check again. Baking powder: the standard baking powder has sodium bicarbonate (base) and an acid (like monocalcium phosphate). When you add liquid, the acid and base react: $NaHCO_3 + H^+ (from acid)
ightarrow Na^+ + H_2O + CO_2$. Wait, the acid is in the baking powder, so the baking powder doesn't need an external acidic ingredient. So the statement "Baking powder needs an acidic ingredient to react" is false because the acid is already present in the baking powder. So the correct answer is A. False. Wait, but I'm confused. Wait, maybe the question is a trick. Let me confirm: Baking soda (pure $NaHCO_3$) needs an acid (external) to react. Baking powder has the acid, so it doesn't need an external acid. So the statement is false. So the answer is A. False.

Answer:

A. False