Chem Lab Word Determination of the Gas Constant R

IB Chemistry SL (Jr)
Candidate: Yunha Kim

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Determination of Gas Constant R through Mg and HCl Reaction
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IB Chemistry SL (Jr)
Candidate: Yunha Kim
Objective

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Candidates will react Magnesium with Hydrochloric acid and collect Hydrogen. The grams of the produced Hydrogen will be calculated and compared to the theoretical yield of Hydrogen.

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Controlled Variables
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Mass of Magnesium Ribbon

This will be kept constant as the objective is to determine the Gas Constant (R). If this is influenced, then the overall yield will be affected as the amount of hydrogen produced will be altered.
The mass will be controlled using a Scale.

Amount of Hydrochloric acid

The amount will be consistent throughout the practical work. Similarly to the mass of Magnesium
Ribbon, when the amount is altered, the overall yield will be influenced as well.

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Apparatus/Chemicals
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Thermometer

Scale

100ml beaker (±0.05ml)

Eudiometer

100ml graduated cylinder (±0.05ml)

Distilled water

Copper wire

Tap water

Rubber stopper (one-holed)

Magnesium ribbon

Buret clamp

10ml Hydrochloric acid

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Diagram
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IB Chemistry SL (Jr)
Candidate: Yunha Kim

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Data Collection and Processing
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Raw data
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Trial 1
Volume of H2/ (±0.05ml)

Trial 2

Trial 3

36,5

30,1

30,1

Mass of Mg/ (±0.01g)

0,028

0,035

0,031

Temperature of H2O/
(±0.05°C)

18,0

18,5

19,0

Temperature of H2O/
(±0.05K)

291,2

291,7

292,2

101,40

101,40

101,40

Higher Water Level
(±0.05cm)

21,5

24,5

28,5

Lower Water Level
(±0.05cm)

12,5

11,0

13,5

Pressure of Atmosphere/
(±0.005kPa)

* The temperature is converted to Kelvin from Celsius for the significance of this lab.

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Qualitative Observation
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I.

Bubbles that vary in sizes form from the copper (Cu) coiled magnesium (Mg) travel upwards
the

Cited: ! "Experimental Determination of the Gas Constant." Experimental Determination of the Gas Constant. N.p., n.d. Web. 29 Nov. 2013. . !9 of !9