Discovering the Mystery of Eleven Test Tubes Essay

2098 WordsDec 3, 20109 Pages
Discovering the Mystery of Eleven Test Tubes Karen Radakovich Ph.D. Mohammad Farhad Brittany Cina CH 223, Spring 08 Abstract: Eleven mystery test tubes labeled from K-1 to K-11 contained: 6M H2SO4, 6M NH3, 6M HCl, 6M NaOH, 1M NaCl, 1M Fe(NO3)3, 1M NiSO4, 1M AgNO3, 1M KSCN, 1M Ba(NO3)2, 1M Cu(NO3)2 respectively. The contents of the test tubes were determined by chemical experiments. Solution K-1 contained NiSO4 because when solution K-9, ammonia which was identified by its pungent odor, was added, an inky dark blue color was made. Iron (Fe (NO3)3) was determined to be in test tube K-2. KSCN was found in test tube K-11 since Fe (NO3)3 and KSCN makes a bloody color when mixed together. Flame tests were conducted in which K-8…show more content…
HCl, it is strong acid and when blended with ammonia, it produces a dense insoluble chloride fog. 4. NaOH, sodium hydroxide is a strong base. It reacts with HCl and forms NaCl and H2O. 5. NaCl, sodium chloride, is a common salt and it burns in the flame test. 6. Fe (NO3)3, Ferric nitrate, is much more active than ferrous. It could be identified by its reddish color and when mixed with thiocyanate, it reveals a “bloody” red color. 7. NiSO4, nickel sulfate was in the past very valuable and it is recognized by its “envious” green nature. 8. AgNO3, silver (I) nitrate is one of the most rare and valuable substances known in the world. It actively participates in reactions with halides and pseudo halides. 9. KSCN, potassium thiocyanate is poisonous to amphibians. It makes a “bloody” red color when put in reaction with iron. 10. Ba (NO3)2, barium nitrate produces pale precipitate when put in reaction with sulfuric acid. 11. Cu (NO3)2, cupric nitrate is used widely in industries. It makes an impersonate ink when mixed with ammonia. 3 Method and Materials: Solutions of 6M H2SO4, 6M NH3, 6M HCl, 6M NaOH, and 1.0 M of NaCl, 1M Fe(NO3)3, 1M NiSO4, 1M AgNO3, 1M KSCN, 1M Ba(NO3)2, and 1M Cu(NO3)2 were given in separate test tubes. The color of possible precipitates, ions, acid-base behaviour, odor and solubility rules were conducted and were reported in Table 1. The key information about a mixture of two solutions was
Open Document