Determining the Empirical Formula of a Compound
Science Lab 4B
Kaitlin Doucet
Mr. McIntosh
Determining the Empirical Formula of a compound
Objectives:
-To form a compound from the elements iron and oxygen
-To determine the empirical formula of a compound produced in this chemical reaction
Supplies
-Ringstand
-Ring support
-Lab Burner
-Crucible
-Crucible tongs
-Water –soluble marker
-Pipestem triangle
-heat resistant mat
-Centigram Balance
_Lab apron
-Safety goggles
-Medicine dropper
Chemical Reagents:
-Steel wool, fine
- 1M ammonium chloride soloution, NH CL
Procedure:
-Refer to page 42 in the “Essential Experiments for chemistry”
Data and Observations (Experimental Results):
Before the reaction | |
Mass of crucible+iron | 27.20g |
Mass of crucible | 24.20g |
Mass of iron | 300g |
After the recation | |
Mass of crucible+compound | 27.90g |
Mass of crucible | 24.09g |
Mass of steel wool | 3.80g |
Observations (Days) | |
1 | Steel wool is dry, coarse, and grey NH CI made steel wool damp Nh CI pooled at bottom of Crucible |
2 | Steel wool is slightly damp turned slightly brown in colour |
3 | Pretty damp, more NH CI is added NH CI is no longer in the bottom of crucible |
4 | Steam coming off wool Crucible red from heat More steam through level of heat |