Saturday, January 16, 2016
Murder Lab Investigation, Day Two
Day Two consisted of weighing the dry filter paper that contained the solid from the reaction. The solid was a pea green powder.
After weighing the filter paper, we subtracted this mass from the mass of just the filter paper to figure out the mass of the solid. Then, we calculated the molarity of this substance and found out that it was roughly 0.07 M. To figure out the identity of the unknown substance, we knew that it must have been silver nitrate because when silver nitrate combines with sodium carbonate, it should make a solid, which is exactly what happened in lab. The 0.07 molarity matched Mr. Green's description, as he was found with traces of silver nitrate with a molarity between 0.05 and 0.15 M.
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Me and my partner had a lot of trouble with the math. We kept multiplying things wrong or to the wrong thing.
ReplyDeleteThanks for the fantastic investigation super sleuth! You solved the mystery and found out Mr.Green was the murderer. Very thorough explanation of your math. We also got the same answers as you. Well Done!
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