Laboratory Techniques and Measurements Essay
Choose any three objects that are shorter than the metric ruler to measure, such as a CD, Key, spoon etc.
OBJECT  LENGTH (cm)  LENGHTH (mm)  ruler  30.5 cm  305 mm  thermometer  15.1 cm  151 mm  pencil  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 …show more content…
Test tube (mL)  Number of drops in 1 mL  Pipet volume (mL)  10  27  4 
Mass Measurements
* Choose seven objects to measure. * Record the hypothesized mass of the first object. Record the measurement in Data Table 4. * Repeat the previous steps for each of the remaining objects. Did your hypotheses become more accurate with practice?
Data Table 4 Object  Estimated Mass (g)  Actual Mass (g)  pen  7g  5.7g  screw  15g  8.1g  cylinder  18g  16.5g  calculator  310g  255.4g  portable phone  150g  127.3g  Google  62g  53.6g  book  450  485.3g 
Density Measurements
* Record all data table similar to Data 5 shown below. * Calculate the density of water.
Data Table 5
Hypothesis: The density of water greater than water
Data Table 5
 Mass A  Mass B  Mass AB    Object  Graduated Cylinder+ Substance  Graduated Cylinder  Substance  Substance Volume  DensityM/V  Water  24.6g  16.5g  8.1g  5mL  1.62  Isopropyl alcohol  24.3g  16.5g  7.8g  5mL  1.56  Saturated salt  25.6g  16.5g  9.1g  5mL  1.82 
Density of irregular objects
* Calculate the density of a small, irregular metal object using the waterdisplacement method. Record the results in a Data table 6.
Data Table 6
 A  B  BA    Object  Graduated Cylinder Volume  Graduated Cylinder + Object  Object Volume 

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