Laboratory Techniques & Measurements

Laboratory Techniques & Measurements

Objectives:

Become familiar with several important laboratory techniques. Gain proficiency with some of the common measuring devices used in a chemistry laboratory. Determine the volume, mass, length, temperature, and density of objects and liquids

  • Length Measurements:
  • Object
  • Length (cm)
  • Length (mm)
  • Pop Can
  • 12.0
  • 120.0
  • iPhone
  • 11.7
  • 117.0
  • TV Remote
  • 16.3
  • 163.0

Temperature Measurements:

  • Hot water from tap (⁰C) - 47
  • Boiling Water (⁰C) - 61
  • Boiling Water after 5 mins.

    (⁰C) - 73Cold water from tap (⁰C) - 15

  • Ice Water (⁰C) - 6
  • Ice Water after 5 mins. (⁰C) - 4

Volume Measurements:

  • Test tube volume (mL) - 10
  • Number of drops in 1 mL - 9
  • Pipet volume (mL) - 4

Mass Measurements:

  • Object
  • Estimated Mass (g) - 7.8
  • Actual Mass (g) - 9.2

Density Measurements:

  • Mass A
  • Mass B
  • Mass A-B
  • Object
  • Graduated
  • Cylinder +
  • Substance

Hypothesis on Salt Compared to Water: The salt solution will have a greater density than pure water as the substance mass is lager.

6. Densities of Irregular Objects:

  • Mass A
  • Mass B
  • Mass B-A
  • Object
  • Graduated
  • Cylinder Volume
  • (mL)
  • Graduated
  • Cylinder + Object (mL)
  • Object Volume (mL)
  • Object Mass (g)
  • Density M/V
  • Metal bolt
  • Water Displacement
  • Method

Questions:

Some reasons for the water not boiling at 100⁰C could be: different temperature settings, not allowing enough time to fully boil and experimental error.

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102⁰C-100⁰C 99.2-100
100⁰C 100

2-0.8
100⁰C 100⁰

0.02 X100%-0.008X100
=2=-0.8
C. Height= 3.6, Base=4.21, Width= 1.17
Volume = bXh/w
4.21X3.6/1.17 = 13.31

Density= mass/volume
21.3/13.31 = 1.6

Density= mass/volume
19.30=26.15/V
-26.15X19.30=V
-504.69=V
V=504.69

Conclusion:

Some new things that I learned from this lab are experimental errors can drastically effect the outcome and adding a substance such as salt to water will increase the density of water.

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I believe I did meet the lab objectives because in result of this lab I became familiar with lab techniques, gained experience using lab measuring devices and I learned the volume, mass, length temperature and density of some objects and liquids.

Updated: Jul 06, 2022
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Laboratory Techniques & Measurements. (2016, Feb 28). Retrieved from https://studymoose.com/laboratory-techniques-measurements-essay

Laboratory Techniques & Measurements essay
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