Worksheet. Pul Bicarbonate/Carbonic acid bumersystem Key: a. CO2 b. CI c. l. Whi

Question

Worksheet. Pul Bicarbonate/Carbonic acid bumersystem Key: a. CO2 b. CI c. l. Which two molecules are produced as by-products of cellular respiration? 2. Which molecule is produced when these two molecules combine? 3. The molecule that is produced is an acid, and when it enters the blood plasma (mostly water), the acid dissociates into which two ions? 4. Looking at the two ions generated, one of the ions contains the carbon dioxide originally produced by your cells during cellular respiration. This is the bicarbonate ion and it is responsible for transporting most co to the lungs. Since bicarbonate (usually in the form of sodium bicarbonate) is also a weak base, it can be used to buffer any "strong" acids that might enter the blood. For example, if sodium bicarbonate should encounter hydrochloric acid, NaHCO, HCI, NaHCO, would dissociate into which two ions? and HCI would dissociated into which two ions? and 5. The ions would then recombine to form which two products? 6. Notice that one of your molecular products is carbonic acid. Would you expect carbonic acid to be a. A weaker acid than hydrochloric acid b. A stronger acid than hydrochloric acid 7. When you use sodium bicarbonate to buffer an acid, you will always get carbonic acid as a product. Once formed, carbonic acid can be used to buffer any strong base that enters the blood. For example, if carbonic acid should encounter sodium hydroxide, H2Cost NaoH, the carbonic acid would dissociate into which 2 ions? and sodium hydroxide would dissociated into which two ions? and 8. The ions would then recombine to from which two molecular products? 9. Notice that one of your molecular products is sodium bicarbonate. Would you expect sodium bicarbonate to be a. A weaker base than sodium hydroxide b. A stronger base than sodium hydroxide

Explanation / Answer

Ans 1: The main by products of cellular respiration are: co2 and H2O.

Cellular respiration utilises oxygen and glucose as reactants generating ATP, co2 and H2O.

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