Question

objective: for this investigation, you will take a closer look at alcohol fermentation and how yeast produces energy. alcoholic fermentation starts with glucose and ends with carbon dioxide and alcohol. c₆h₁₂o₆ → 2co₂ + 2c₂h₅oh + 2atp glucose carbon dioxide ethanol energy how should we measure the amount of co₂ produced by the yeast in this flask?

Explanation:

Step1: Consider gas - volume relationship

The volume of a gas is proportional to the amount of gas molecules under constant temperature and pressure.

Step2: Use displacement method

We can collect the $CO_2$ gas produced by the yeast in the flask. One way is to displace a liquid (such as water) with the $CO_2$ gas. Measure the volume of the displaced liquid, which is equal to the volume of the $CO_2$ gas produced. Another way is to use a gas - pressure sensor to measure the increase in pressure inside a closed system containing the yeast and glucose solution. Since the volume of the container is fixed, the increase in pressure is related to the amount of $CO_2$ gas produced according to the ideal gas law $PV = nRT$.

Answer:

Collect the $CO_2$ gas by displacing a liquid and measure the volume of the displaced liquid, or use a gas - pressure sensor to measure the pressure increase in a closed system.