Give a list of laboratory apparatus and equipment that are to be utilized for the preparation of 500 mL of 0.2 M K4 Fe (CN) 6. Also give the procedure of preparation.
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Give a list of laboratory apparatus and equipment that are to be utilized for the preparation of 500 mL of 0.2 M K4 Fe (CN) 6. Also give the procedure of preparation.
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- Give the detailed step by step procedure for the preparation of 500 mL of 0.2 M K4 Fe (CN) 6.If a 10.0mL volumetric flask is used to prepare the dilution, what volume of 0.50 M cobalt (II) nitrate is needed to prepare a 0.15 M standard solution?Describe the preparation of 500 mL of 0.0750 M AgNO3 from the solid reagent.
- 1. How is complete precipitation assured in the Group III Cations? 2. In the confirmatory test of Magnesium ion, why is it necessary to heat the centrifugate in water bath for 5 minutes? 3. If Magnesium hydroxide is a white gelatinous precipitate, why is the confirmatory result indicated a blue precipitate?4. a. Describe the preparation of 1.67 L of 5.00% (w/v) K2Cr2O7 from the solid salt. b. What is the ppm K2CR2O7 in the above solution?Why a precipitate of manganese dioxide be removed from the potassium permaganate solution before standardization?
- describe the preparation of 4L of 0.250M HCLO4, starting with an 8M solution of the reagent.Calculate the equilibrium concentration of N2O4 in 1.00 L of a solution prepared from 0.129 mol of N2O4 with chloroform as the solvent. (Assume that the change in concentration of N2O4 is small enough to be neglected).Write the procedure and necessary calculations for the preparation of 250 mL of 100 PPB of Cadmium from Cadmium nitrate.
- What is the role of cobalt glass for the flame test of potassium? Explain. Why was the flame test used for the qualitative determination of K and Na? Why was the sample being made alkaline with 3M KOH and heated for the qualitative test for NH4+?You are assigned an unknown solution that contains Group III cations. To -1 mL of this solution was added 6 M NH3 the solution was agitated to mix well, and a reddish-brown precipitate with a gelatinous solid clinging to the inner walls of the test tube was observed. The solution was centrifuged and the supernatant was tested for completeness of precipitation by adding an additional drop of 6 M NH3. No cloudiness was observed as the drop of reagent diffused through the solution. The supernatant was then carefully decanted into a clean test tube, labeled (1st solution), and saved for further testing later. The precipitate remaining in the test tube was washed with a small amount of water, centrifuged, and the wash decanted and discarded. To the precipitate was added about 10 drops of 6 M NAOH plus ~1 mL H20 and the test tube was vigorously agitated. The resulting suspension was centrifuged and the supernatant liquid was transferred to another clean test tube and clearly labeled (2nd…Explain the role of potassium hexacyanoferrate(II), K4[Fe(CN)6] as a component of the Benedict’s reagent for the Estimation of Glucose