Kinetic Molecular Theory Gas Laws - Oakland Schools

Data Table
Reaction between NH 3 and HCl
Total distance between the starting marks
Distance traveled by the NH 3 gas
Distance traveled by the HCl gas
Reaction between NaOH and HCl
Total distance between the starting marks
Distance traveled by the NaOH gas
Distance traveled by the HCl gas
Distance (cm)
Distance (cm)
Analysis and Conclusion Questions:
1. Write a balanced chemical equation to describe each reaction observed.
2. Give a possible reason for the location of the salt ring in each trial.
3. For each trial, calculate the ratio (acid/dbase) of the distances traveled by the gases.
4. Using the molar masses of the gases and Graham’s law, calculate the ratio of
diffusion of ammonia to the diffusion rate of HCl, and the rate of diffusion of sodium
hydroxide to the diffusion rate of HCl.
5. Compare the values calculated for questions 4 and 5. Are these results consistent
with Graham’s law? Explain with evidence.
6. Suppose the distance between the solutions in the straw is 40.0 cm. Use
Graham’s law to calculate the distance the ammonia and hydrochloric acid gases
would travel before they collide.
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