Flashcards on Gas Collection and Experimental Setup Diagrams
Gas Collection & Experimental Setup Diagrams: A Student Guide
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Collecting and measuring gases in experiments
7 cards
Card 1
Question: Why must an experimental system be sealed when measuring a gas produced by a reaction?
Answer: If the system is not sealed some gas could escape, making the results inaccurate.
Card 2
Question: What is the most accurate way mentioned to measure the volume of a gas produced?
Answer: Collecting the gas in a gas syringe.
Card 3
Question: How do you collect gas by displacing water using a measuring cylinder?
Answer: Fill a measuring cylinder with water, place it upside down in a water container, record the initial water level, position the delivery tube inside the
Card 4
Question: Why is collecting gas by water displacement less accurate than using a gas syringe?
Answer: Some gases can dissolve in water, so less gas ends up in the measuring cylinder than is actually produced.
Card 5
Question: How can you collect a sample of gas for later testing without measuring its volume?
Answer: Collect it over water in a test tube; once full of gas, stopper the tube and store it.
Card 6
Question: When drawing diagrams of experimental apparatus, how should pieces of glassware be drawn?
Answer: Draw them as scientific drawings showing cross-sections, typically without tops unless the system is closed—in which case include a bung.
Card 7
Question: What should you include when writing a method for an experiment involving gas collection?
Answer: A labelled diagram showing how the apparatus will be set up.