Verification of Avogadro's Law

Overview

Objectives/Goals The purpose of my project is to see if equal volume of gasses at the same temperature and pressure contain equal number of moles (Avogadro's Law) Methods/Materials I poured the liquid reactant in the plastic bottle, hold the bottle horizontal and slowly added the solid chemical, capped the bottle with a syringe inserted in the stopper and turned it upright, for chemical reaction to start. I collected 135mL of the gas produced and find the mass. I used different reactants to produce different gases. I produced oxygen, carbon dioxide, ammonia, and hydrogen. I repeated the trials 3 times for each gas, find the average mass. Knowing the mass, and using the RAM (relative atomic mass) I found the number of moles. Number of moles for different gases was very close, but not identical. Results The number of moles for different gasses were not identical, but I was amazed that they were very close. Conclusions/Discussion I think one of the reasons to not get exactly the same number of moles for different gasses, was the precision of the scale I used. The scale precision was 100ths of gram, with 1000ths of gram I could have better reading. Also maintaining exactly the same pressure, needed more complicated equipment that I didn't have access to.

Competition history

• CSEF 2003 Chemistry · Entry J0507

Resources

• CSEF project summary ↗

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