sample
Haven't found the Essay You Want?
For Only $12.90/page

Laboratory Techniques & Measurements Essay

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

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

2. Temperature Measurements:

  • Hot water from tap (⁰C) – 47
    Boiling Water (⁰C) – 61
    Boiling Water after 5 mins.(⁰C) – 73

    Cold water from tap (⁰C) – 15
    Ice Water (⁰C) – 6
    Ice Water after 5 mins. (⁰C) – 4

3. Volume Measurements:

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

4. Mass Measurements:

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

5. 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:

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

B. 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

D. 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. 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.


Essay Topics:


Sorry, but copying text is forbidden on this website. If you need this or any other sample, we can send it to you via email. Please, specify your valid email address

We can't stand spam as much as you do No, thanks. I prefer suffering on my own

Courtney from Study Moose

Hi there, would you like to get such a paper? How about receiving a customized one? Check it out https://goo.gl/3TYhaX