Lab Report

Only available on StudyMode
  • Download(s) : 93
  • Published : March 26, 2013
Open Document
Text Preview
Lab #7
Purpose: The purpose of this experiment is to analyze known solutions of Ba(NO3)2, Ca(NO3)2, Mg(NO3)2 and Sr(NO3)2 (alkaline earths) and known solutions of NaBr, NaCl and NaI (halogens). Then we are given an unknown solution to determine what ions are present. Materials:

1. Test tubes
2. Test tube holder
3. Pipet
4. 1 M H2SO4
5. 0.1 M Na(NO3)2
6. 0.1 M Ca(NO3)2
7. 1 M Na2CO3
8. 0.25 M (NH4)2C2O4
9. 0.1 M KIO3
10. Bromine water
11. Chlorine water
12. Iodine water
13. 0.1 M NaCl
14. 0.1 M NaBr
15. 0.1 M NaI
16. Unknown (E)
Methods:
Alkaline Earths

1. Wash the test tubes of any residue
2. Add 12 drops of 1m H2SO4 to four test
3. Then add 12 drops of 0.1m Ba(NO3)2 to one test tube containing 1M H2SO2 4. Add 12 drops of 0.1m Ca(NO3)2 to another test tube containing 1M H2SO2 5. Add 12 drops of 0.1m Mg(NO3)2 to another test tube containing 1M H2SO2 6. Add 12 drops of 0.1m Sr(NO3)2 to the final test tube containing 1M H2SO2 7. Observe and take notes on the precipitate or the lack of precipitate in each reaction 8. Clean the test tubes after taking notes

9. Repeat the procedure, but now with 12 drops of 1m Na2CO3 in each test tube 10. Add 12 drops of 0.1M Ca(NO3)2 to another test tube containing 1M Na2CO3 11. Add 12 drops of 0.1M Mg(NO3)2 to another test tube containing 1M Na2CO3 12. Add 12 drops of 0.1M Sr(NO3)2 to the final test tube containing 1M Na2CO3 13. Observe and take notes on the precipitate or the lack of precipitate in each reaction 14. Clean the test tubes after taking the notes

15. Repeat the process with 12 drops of 0.25M (NH4)2C2O4
16. Observe and take notes on the precipitate or the lack of precipitate in each reaction 17. Clean the test tubes after taking the notes
18. Repeat the process with 12 drops of 0.1M KIO3
19. Observe and take notes on the precipitate or the lack of precipitate in each reaction...
tracking img