Measuring liquids and reading a thermometer
Get to know the bench: measure 50 mL of water, transfer it and take its temperature.
Objectives
- Identify a beaker, measuring cylinder and thermometer.
- Measure a volume of liquid accurately.
- Transfer a liquid without spilling and record its temperature.
Theory
Volume is read from the bottom of the meniscus with your eye level with the liquid surface. A measuring cylinder is more accurate than a beaker because it is narrower, so the same change in volume gives a bigger change in height.
Procedure
- Put on your safety goggles and lab coat.
- Place a beaker on the bench.
- Place a measuring cylinder on the bench.
- Measure 50 mL of distilled water in the measuring cylinder.
- Pour the water from the cylinder into the beaker.
- Place a thermometer on the bench and measure the temperature of the water.
Precautions
- Read the meniscus at eye level.
- Keep the thermometer bulb fully in the liquid and away from the glass.
- Subject
- Chemistry
- Grade
- 8–9
- Chapter
- Matter (Nepal National Curriculum (CDC), grade 8)
- Difficulty
- Easy
- Duration
- 10 min
- Safety level
- Low
- Version
- 1.0
Apparatus
- Beaker (250 mL)
- Measuring cylinder (100 mL)
- Thermometer
Chemicals
- Distilled water H₂O
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