[cs_content][cs_section parallax=”false” separator_top_type=”none” separator_top_height=”50px” separator_top_angle_point=”50″ separator_bottom_type=”none” separator_bottom_height=”50px” separator_bottom_angle_point=”50″ style=”margin: 0px;padding: 45px 0px;”][cs_row inner_container=”true” marginless_columns=”false” style=”margin: 0px auto;padding: 0px;”][cs_column fade=”false” fade_animation=”in” fade_animation_offset=”45px” fade_duration=”750″ type=”1/1″ style=”padding: 0px;”][cs_text]Production of Materials > 3. Renewable Ethanol >
Solve problems, plan and perform a first-hand investigation to carry out the fermentation of glucose and monitor mass changes[/cs_text][/cs_column][/cs_row][/cs_section][cs_section parallax=”false” separator_top_type=”none” separator_top_height=”50px” separator_top_angle_point=”50″ separator_bottom_type=”none” separator_bottom_height=”50px” separator_bottom_angle_point=”50″ style=”margin: 0px;padding: 45px 0px;”][cs_row inner_container=”true” marginless_columns=”false” style=”margin: 0px auto;padding: 0px;”][cs_column fade=”false” fade_animation=”in” fade_animation_offset=”45px” fade_duration=”750″ type=”1/1″ style=”padding: 0px;”][cs_text]
Glucose can be fermented using the following procedure:
- Place the following in a flask:
- About 50 grams of glucose.
- About 150 millilitres of water.
- A few crystals of citric acid.
- About 5 grams of yeast.
- Measure and record the mass of the flask.
- Attach an airlock apparatus containing limewater to the top of the flask.
- Stand the flask in a warm place, with a temperature of approximately 37°C, for three days.
- Over the three days, carbon dioxide should be produced, which will form a white precipitate in the limewater (calcium carbonate) as it bubbles through.
- Measure and record the mass of the flask at various times throughout the three days.
- Due to the production and release of carbon dioxide, a mass loss should be observed.
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