Separation and Qualitative Determination of Cations and Anions Instructor’s Guide Master Materials List (complete for 24 students working in pairs) Silver nitrate, AgNO3, 0.2 M, 100 mL* Silver nitrate, AgNO3, 0.1 M, 100 mL* Cupric nitrate, Cu(No3)2, .02 M, 100 mL* Zinc nitrate, Zn(NO3)2, 0.2 M, 100 mL* Ferric nitrate, Zn(NO3)2, 0.2 M, 100 mL* Hydrochloric acid, HCl, 6 M, 125 mL* Nitric acid, HNO3, 6 M, 125 mL* Ammonia, NH3, 6 M, 125 mL* Sulfuric acid, H2SO4, 6 M, 125 mL* Acetic acid
Overall this experiment was successful, as it was possible to determine which unknown salt solution the cation belonged too, and also the pairing anion. To figure out the cations, many tests and observations were needed to be made. With the gathered flame test results, and the information given in the procedure, conclusions could be made. Solution A is Sr2+ since it tested crimson red. Solution C is Ba2+ because it tested green. Solution D is Li+ because it turned the flame carmine red. Finally,
Investigating the Determining Characteristics of Cations and Anions Chem 111 Sec 560 Introduction: The purpose of this lab was to study the specific characteristics of cations and anions, and ultimately to be able to identify an unknown substance based on our studies and tests using the logic trees developed through the experiment. A logic tree is a graphical display of the findings from this lab which, through a series of yes/no questions, elimination
(These are made by combining a metal with a nonmetal or a metal with a polyatomic anion, ionic compounds are held together by the interaction of positive and negative charges) These are made by combining a cation (an atom or polyatomic ion with a positive charge) with an anion (an atom or polyatomic with a negative charge.) To name an ionic compound name the cation first and then the anion. The Cation A. If the cation has a single possible charge then simple list the metal or polyatomic ion. This
The Separation and Identification of a Series of Cations Ethan Northcutt BB2 November 2nd, 2016 Abstract Ten cations were reacted with eleven anions and the results of the reactions were recorded; the reactions were performed so that the results could be used in the qualitative analysis of an unknown mixture containing a combination of the same ten cations. There are some distinct differences between the reactions that occurred and the reactions that were predicted to occur. The discrepancies
The objective of the experiment was to identify the unknown salt that was given. The unknown salt contained an anion and a cation labelled, 38A. A series of preliminary tests were first conducted in order to help choose which confirmation tests should be used to identify the compound. The preliminary tests included pH and solubility, and the behaviour of the salts with concentrated sulfuric acid. The compound was found to have a slightly acidic pH, around 6.9 while being soluble in water. The compound
for the unknown anion, when it is added to Ba(No3)2, and AgNo3, it forms a ppt as well. When HNO3 is added to BaSO4, the ppt disappeared; for the unknown anion, when HNO3 is added to unknown, the ppt disappeared too, therefore we can conclude that the unknown is SO42-. Follow-Up Questions: 1. Devise a sequence of reactions to follow (using filtering or centrifuging where necessary to remove precipitates) to identify an unknown containing two or more cations of Group 2 elements
Cations take electrons so they are shown as a rectangle with an indent which symbolizes a slot for an electron to be taken. If they require multiple electrons to be given to them, they are shown as a rectangle with multiple indents, one for each needed electron. Anions give electrons so they are shown as a rectangle with a tab which symbolizes an extra electron that they want to give away. If the anion have multiple electrons to give away it is shown as a rectangle with multiple tabs on it, one for
The sodium cation did not have an effect on pH. We tested sodium acetate, sodium carbonate, sodium bicarbonate, sodium bisulfate, sodium bisulfite, sodium chloride, sodium citrate, sodium formate, sodium iodide, and sodium hydroxide. The pHs of these compounds ranged from 1.25 to 13.00, which were sodium bisulfate and sodium hydroxide, respectively. Sodium bisulfite and sodium carbonate had average measured pHs of 4.24 and 11.13, respectively. Since this range is so wide, we can conclude
I compared the results with other anions from my table of solubilities, and phosphate’s results are the only ones that matched with mine, but sulfate’s did not. This helped me to figure out the known anion. Cation Percipitate Test #3 1. For this percipiate test with my unknown H chemical, I mixed it with , or Copper III nitrate. The purpose of this test was to determine whether my unknown formed a percipitate with this compound, and to eliminate cations. 2. If the reaction with is insoluble