O Levels Chemistry (5070)•5070/11/O/N/22

Explanation
Matching apparatus to measurement type and precision
Steps:
- Identify the substance: options A, B, D involve solutions (liquids); C involves gas.
- Select apparatus by function: measuring cylinders for approximate liquid volumes; pipettes for precise fixed liquid volumes; burettes for variable liquid dispensing; gas syringes for gas collection.
- Check volume suitability: ensure apparatus capacity and precision match the given value.
- Eliminate mismatches: liquids need liquid-handling tools; gases need gas-specific tools.
Why C is correct:
- Gas syringes are designed for accurate measurement of gas volumes, as they collect and displace gases directly per ideal gas law applications in experiments.
Why the others are wrong:
- A: Measuring cylinders provide lower precision for 25.0 cm³ solutions; pipettes are better for exact liquid transfers.
- B: Pipettes deliver fixed volumes (e.g., 25 cm³), not arbitrary 32.7 cm³ for solutions.
- D: Burettes typically hold up to 50 cm³ for titrations, exceeding capacity for 80 cm³ solutions.
Final answer: C
Topic: Experimental design
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