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Chem Lab - Density

Essay by   •  May 25, 2016  •  Lab Report  •  1,657 Words (7 Pages)  •  1,211 Views

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                                         Experiment 1: Density

                                           February 8th 2016

                                         Professor Dr. Stanley

          Monday 12:00-2:50p  

Introduction: Density is most often described as mass per volume of a substance. Mathematically, it can be written as;

           d=m/v 

The purpose of this experiment is to determine the density of an unknown metal in Part A,

and also to determine the density of a water/ethanol mixture in Part B. In order to acquire my results, the approach I used involved following the proper instructions given. In order for my findings to be precise I meticulously recorded exact measurements.

Data & Results:

Part A: Density of unknown metal

After 1st addition of metal

After 2nd addition of metal

After 3rd addition of metal

After 4th addition of metal

Volume of water plus metal

36.0mL

38.0mL

40.0mL

42.0mL

Volume volume of water in cylinder prior to addition of first metal portion*

35.0mL

35.0mL

35.0mL

35.0mL

Volume of metal

1.0mL

3.0mL

5.0mL

7.0mL

Mass of cylinder, water and metal

118.02g

123.46g

132.93g

142.95g

Initial mass of cylinder plus water prior to addition of first metal portion#

108.94g

108.94g

108.94g

108.94g

Mass of metal

9.06g

15.52g

26.99g

38.06g

Density: Determined by slope the line = 5.60

Unknown metal: Mossy Tin

Part B: Density of water/ethanol mixture                         Unknown #5

Mass of Erlenmeyer + solution (g)   131.671            140.105      152.43          168.121      177.711

Mass of Erlenmeyer (g)                  113.184     131.671      140.105        152.428      168.121  

Mass of solution (g)                          17.83         8.435                 12.32            15.69           9.589

Final buret reading(mL)                    42.61        19.60           32.52            49.60           34.00

Initial buret reading (mL)                 23.6          10.0              12.5                 23.6             17.5

Volume of Solution (mL)                 19.0          9.40              20.0              26.0             16.5

Temperature (Degrees C)                  20.0           20.0              20.0              20.0             20.0 

Density (m/V)                                  .9384         .8973            .6161           .6035           .5811

Deviation from mean                         Density                    Absolute Deviation

Trial 1                                         .9384                                .21112

Trial 2                                         .8973                                .17002

Trial 3                                         .6161                                .11118

Trial 4                                         .6035                                .12378

Trial 5                                         .5811                                .14618

...

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