A liquid level apparatus on a plastic base serves several essential functions in scientific experiments and measurements. Let’s explore its key roles:

1. Measuring Liquid Volume:

   • The apparatus allows precise measurement of liquid volumes. Common tools include:
     • Measuring Cylinder (Graduated Cylinder): Used for approximate volumes, available in various sizes (from 10 cm³ to 1 liter).
     • Volumetric Pipettes: Highly accurate for fixed volumes (usually 10 cm³ or 25 cm³), with a scratch mark on the neck for precise measurement.
     • Burettes: Ideal for measuring variable volumes (0 cm³ to 50 cm³), commonly used in titrations.
   • Units of measurement: milliliters (ml) or cubic centimeters (cm³).

2. Time Measurement:

   • Time can be measured using a stopwatch or stopclock, accurate to one or two decimal places.
   • Units: seconds or minutes (for slow reactions, e.g., rusting).

3. Temperature Measurement:

   • Thermometers (both traditional and digital probes) are used to measure temperature.
   • Units: degrees Celsius (°C).

4. Mass Measurement:

   • Digital balances provide readings to two decimal places.
   • Units: grams (g) or kilograms (kg).

5. Gas Volume Measurement:

   • Gas syringes or inverted graduated cylinders (if the gas isn’t water-soluble) are used to measure gas volume.
   • Units: milliliters (ml) or cubic centimeters (cm³).