Chemistry Lab Experiment: To Decarbonate Soft Drinks

first-hand investigation – decarbonating soft drink

identify data, plan and perform a first-hand investigation to decarbonate soft drink and gather data to measure the mass changes involved and calculate the volume of gas released at 250C and 100kpa
Aim: to decarbonate soft drink and measure the mass changes involved and calculate the volume of gas released
Hypothesis: When decarbonating soft drink, carbon dioxide will be lost to the atmosphere, decreasing the mass of the soft drink can.

independent variable: dependent variable: mass changes involved (mass and volume of CO2 released) controlled variables: type of soft drink (lemonade), amount of soft drink in experimental can (375ml), amount of water in control can (375ml), ambient temperature (25 degrees Celsius), area where control and experimental cans place (must be same), opening the control and experimental can at the same time control: can of water
(needed to find out how much weight loss is due to evaporation of water rather than carbon dioxide gas thus the loss of mass from the control can be subtracted from the mass lost by the experimental can)

equipment:
- lemonade soft drink can
- electronic balance
- can of water

risk assessment: there is minimal risk to this experiment as it has harmless equipment used

method:
1)weigh closed can of soft drink and record results
2) open can of soft drink
3) weigh a can filled with 375ml of water
4) record mass of open soft drink and can of water daily over several days

Diagram:

Results:

group
Mass (g)
1
2.6
2
2.9
3
2.5
4
2.4
5
1.8

(Group 2 and 5 are outliers)

mean: 2.5
2.6 + 2.5 + 2.4 = 7.5
7.5/3 = 2.5
Calculations:

Result for Group 1:
Experimental can mass change: 408.7 – 403.1 = 5.3g control can mass change: 388.3 – 385.6 = 2.7g
CO2 lost: 5.3 – 2.7 = 2.6g volume of CO2 (g) released at 250C and 100kPa (24.79L) for average (V = n x V x m)

n(CO2) = m/M
= 2.6/12.01 + 32 =