The substance to be analyzed – is white, highly soluble in water salt. Interaction with concentrated sulfuric acid leads to evolving of reddish-brown gas with pungent odour. Addition of ammonium oxalate leads to formation of white precipitate, which is insoluble in acetic acid. Diphenylamine reaction turns color of the solution to violet. What kind of salt is this? Ca(NO3) 2 NaNO2 KBrO3 MgCl2

The substance to be analyzed – is white, highly soluble in water salt. Interaction with concentrated sulfuric acid leads to evolving of reddish-brown gas with pungent odour. Addition of ammonium oxalate leads to formation of white precipitate, which is insoluble in acetic acid. Diphenylamine reaction turns color of the solution to violet. What kind of salt is this? Ca(NO3) 2 NaNO2 KBrO3 MgCl2

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Now the student wants to test the decanoate from question 5 for the presence of the remaining cation. She adds 6M HNO3 to the decanoate until it is acidic. What is the color of the precipitate? Write the balanced chemical equation for the reaction that occurred. To summarize the student’s results, which of the Group I cations can the student conclude are present in UK #1? * here is question 5 with the answer * Now the student wants to test the precipitate from the G1-2 step (question 3) for the two remaining cations. In the G1-3 step, she adds 6M NH3 to the precipitate, stirs and centrifuges. The clear supernatant is decanted into a new test tube. Which of the chloride salts of the Group I cations dissolves in aqueous NH3? Write the balanced chemical equation for this reaction. In the G1-3 step, AgCl dissolves in 6M NH3 since it forms a soluble complex ion with ammonia and HgCl2 in insoluble. AgCl +2NH3 Ag(NH3)+2+Cl-
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Prepare 100.00 mL of a solution with the following chemicals; solid FeCl3 6H2O, iron(II) chloride hexahydrate (source of FeCl3) dilute hydrochloric acid in the rack – 3.0 M solid sodium salicylate – 99.7% assay Concentrations: FeCl3: 0.020 M HCl: 0.050 M Salicylate (mg/L): 40.25 PLEASE SHOW HOW TO CALUATE AND WORK. The only equations you will need to use are the equations for molarity and dilutions.
5.00 g of solid Al(NO3)3 was added to enough water to make a solution with a total volume of 100.0 mL. Al(NO3)3 is very soluble in water and this much solid will fully dissolve in a 100.0 mL solution. If 65 mL of water was added to the original 100.0 mL Al(NO3)3 solution described to the left in order to dilute the solution. Calculate the new diluted solution concentration, in Molarity? Assume the volumes of the 2 solutions are additive.
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Most analytical machines used in science can either measure absorbance of light, like the spectrophotometers used BioZ 151 and 152 labs, or can measure change in electrical conductance. In order to convert things like absorbance values into concentration data, a linear regression is used. In order to determine nitrite concentration in water samples, nitrite is reacted with several chemicals to produce a purple color. The absorbance of the solution is measured from known amounts of nitrite to produce a standard curve to analyze samples. Use the data in the provided table, or from the linked spreadsheet to make a graph and perform a linear regression using treadline. mg/L NO3 Absorbance 0 0.1 0.3 0.5 0.7 o 0.183 0.542 0.914 1.298) 1.61) In order for this to work, samples must be diluted prior measurement so that the concentration falls within the range of the standard curve. If a sample underwent a 30 dilution, and produce an absorbance value of 0.953, what is the resultant concentration…