Experiment Area
ready
Time0.0 s
H2 Volume0.0 mL
Controls
Magnesium Mass [g]
Form of Magnesium
Note: The simulation runs at four times normal speed: 1 real second corresponds to 4 simulation seconds. Settings can only be changed before starting or after the simulation has ended or been reset. The controls are locked while the simulation is running or paused. Your own measurement conditions can be entered in the “Data” tab for analysis.
Time t [s]
V(H2) [mL]
Experimental Conditions:
Enter the measured times. The table and graphs are updated by selecting “Calculate”.
| No. | t [s] | V(H2) [mL] | n(H2) [mol] | n(H₃O⁺) [mol] | c(H₃O⁺) [mol L-1] |
|---|
Analysis Questions:
- Compare your measurements with the simulation. Where do they differ?
- Based on your observations and the experimental setup, explain at least three possible reasons why your measurements differ from the simulation.
- Explain why the mass of the magnesium ribbon in the simulation affects not only the maximum amount of hydrogen produced, but also the reaction rate.
Notes:
n(H2) = V / Vm
Vm = 24 L mol⁻¹
n(H₃O⁺) = n₀(H₃O⁺) − 2 · n(H2)
n₀(H₃O⁺) = 0.025 mol
c(H₃O⁺) = n(H₃O⁺) / V(solution)
V(solution) = 50 mL = 0.05 L
Concentration-Time Graph
Time t [s]
c(H₃O⁺) [mol L-1]