Flashcards on Electrolysis and Potometer Experiments
Electrolysis and Potometer Experiments: Your Study Guide
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Potometer setup and plant transpiration
10 cards
Card 1
Question: What is a potometer used to measure?
Answer: Water uptake by a plant (used to estimate transpiration rate).
Card 2
Question: Why should you cut a shoot underwater when setting up a potometer?
Answer: To prevent air from entering the xylem. Cutting underwater stops air entry.
Card 3
Question: Why is the shoot cut at a slant for a potometer setup?
Answer: A slanted cut increases the surface area available for water uptake.
Card 4
Question: When should the potometer be assembled and the shoot inserted to avoid air in the system?
Answer: Assemble the potometer in water and insert the shoot under water so no air can enter.},{
Card 5
Question: After assembling the potometer and inserting the shoot, what should you do before taking measurements?
Answer: Remove the apparatus from the water but keep the end of the capillary tube submerged in a beaker of water; check it is watertight and airtight; dry th
Card 6
Question: How do you introduce a single air bubble into the capillary tube during setup?
Answer: Remove the end of the capillary tube from the beaker until one air bubble has formed, then put the end of the tube back into the water.
Card 7
Question: What two properties must be checked for the potometer apparatus before use?
Answer: That the apparatus is watertight and airtight.
Card 8
Question: What should you do to the leaves before starting measurements with a potometer?
Answer: Dry the leaves and allow time for the shoot to acclimatise.
Card 9
Question: Why is one air bubble formed in the capillary tube during potometer setup?
Answer: An air bubble is used as a marker to track water uptake (to estimate transpiration rate).
Card 10
Question: Which step ensures the potometer remains connected to the water supply while measuring?
Answer: Keep the end of the capillary tube submerged in a beaker of water after removing the apparatus from the water.