Laboratory Techniques and Measurements
Choose any three objects that are shorter than the metric ruler to measure, such as a CD, Key, spoon etc.
| LENGTH (cm)
| LENGHTH (mm)
| 30.5 cm
| 305 mm
| 15.1 cm
| 151 mm
| 16.7 cm
| 167 mm
Warm Temperature Measurements
* Fill a 100 a 100mL beaker with 50mL of hot water. Get the water as hot as possible. * Use thermometer to measure the temperature of the water in the beaker using Celsius unit. Record measurement in Data Below. * Place the beaker of the water on the wire gauze burner stand. * Remove the cap from the burner fuel and set aside. Light the fuel and slip it under the burner stand. * Bring the water to full boil and record its temperature. Record the measurement in data below. * Let the water boil for about 5 minutes. Record the measurement in data below.
Cold Temperature Measurements
Allow the 100 mL beaker to cool. Fill the beaker with cold tap water and then record for the water temperature Data below. *
Prepare an ice water bath by adding ice to the beaker filled with cold tap water. *
Immerse the thermometer in the ice bath and stir gently. Record the temperature Data below. *
Let the ice water stand about 5 minutes. Then record the temperature in Data below. Hot water from tap (Celsius)
| Boiling Water (Celsius)
| Boiling water- 5 min
Cold water from tap(Celsius)
| Ice water (Celsius)
| Ice water-5 min
* The curved surface of the lid in a glass is cylinder is called the meniscus. * Fill a small test tube with water.
* Pour the water from the test tube into the 25 mL graduated Cylinder. Record the volume of the water below. Empty the graduated cylinder. * Determine the volume of a thin –stemmed pipet:
a) Completely fill a clean, empty pipet with water.
b) Hold the pipet vertically multiple times to expel all the water...
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