Discovering the Mystery of Eleven Test Tubes
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 burned green which identifies Cu(NO3)2, and the solution from test K-10 burned yellow orange which indicates NaCl. Solution from test tube K-5 turned red litmus paper to blue which indicates a strong base (NaOH). Solutions in test tubes K-4 and K-6 are both strong acids which turned blue litmus paper to blue. Silver nitrate (K-7) produces precipitate with both acids and Barium nitrate can only produce precipitate with H2SO4 and it remains clear in HCl, K-3 precipitated with K-4 but did nothing with K-6, which proves that K-4 is H2SO4 and K-6 is HCl.
Introduction:
1Water has many unique chemical and physical properties. Water goes through various reactions and possesses unusual properties to sustain life on Earth. Water has the ability to dissolve a wide variety of substances. Therefore, in nature, water has a variety of dissolved substances such as different elements, salts, gases. Any solution in which water is solvent is called aqueous solutions.
Most aqueous solutions share the same chemical and physical characteristics, which makes it very difficult to identify without conducting various chemical tests. For determining the identity of unknown chemical solutions, it is important to understand the solubility and insolubility
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 burned green which identifies Cu(NO3)2, and the solution from test K-10 burned yellow orange which indicates NaCl. Solution from test tube K-5 turned red litmus paper to blue which indicates a strong base (NaOH). Solutions in test tubes K-4 and K-6 are both strong acids which turned blue litmus paper to blue. Silver nitrate (K-7) produces precipitate with both acids and Barium nitrate can only produce precipitate with H2SO4 and it remains clear in HCl, K-3 precipitated with K-4 but did nothing with K-6, which proves that K-4 is H2SO4 and K-6 is HCl.
Introduction:
1Water has many unique chemical and physical properties. Water goes through various reactions and possesses unusual properties to sustain life on Earth. Water has the ability to dissolve a wide variety of substances. Therefore, in nature, water has a variety of dissolved substances such as different elements, salts, gases. Any solution in which water is solvent is called aqueous solutions.
Most aqueous solutions share the same chemical and physical characteristics, which makes it very difficult to identify without conducting various chemical tests. For determining the identity of unknown chemical solutions, it is important to understand the solubility and insolubility