Please Help!! My mind can't focus. 1. Identify the type of cell depicted in the diagram ( electric cell I think)
2. Why is an external power source needed for the chemical change to occur in the cell
3.Write the half-reaction that occurs at the cathode of the cell. Explan your answer.

You exhale co2 which is produced during cellular respiration.  co2 combines with the water in your blood's plasma to make up one half of the body's most important buffer pair, carbonic acid.  the more physical activity you engage in, the more co2 your body is producing.  you can see this by putting some of the cabbage indicator in a glass and then blowing bubbles into it through a straw.  can you see a change in the color of the indicator?