A student put 25.0 cm³ of dilute hydrochloric acid into a conical flask. The student added 2.5 g of solid sodium carbonate and measured the change in temperature of the mixture: Which apparatus does the student need to use to obtain the most accurate results?
- Burette, Pipette, Thermometer
- Balance, Measuring Cylinder, Thermometer
- Balance, Pipette, Thermometer
- Balance, Pipette, Stopwatch
Explanation
- To obtain accurate results, precise measurement of mass and volume is essential.
- A balance is used to measure 2.5 g sodium carbonate accurately.
- A pipette measures 25.0 cm³ acid more accurately than a measuring cylinder.
- A thermometer is needed to record temperature change.
- Therefore, these three give the most accurate results.
Last verified on 12-04-2026
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