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Prepare 2ppm,4ppm, 6ppm, 8ppm and 10ppm of Cd (NO3).4 H2O in a 100ml
Step by step
Solved in 2 steps
- Prepare 2ppm, 4 ppm, 6ppm, 8ppm, 10 ppm of Cd(NO3). 4H2O in a 500mlPrepare 0,1ppm, 0,5ppm , 1ppm 2ppm , 4ppm, 6ppm , 8ppm , 10ppm and 12 ppm In a 100ml from a Cd (NO3).4 H2O 1000ppm solutionMethod used was Volhard Method Sample preparation: 5ml sample diluted in 100 ml. 20ml aliquot was used for analysis. Concentration of AgNO3: 0.0609M Calculate mass of NaCl and % NaCl (w/v)
- You are given a container with Na3PO3 that is reportedly contaminated. You are asked by your supervisor to determine the percent purity of that sample in order to know the next measures to be taken by the plant. The following are the procedures that you need to do: a. Dissolve sample weighing 1 g in 35 mL water. b. Prepare solution with 45 mL 3% w/v HgCl2, 30 mL 10% w/v C2H3NaO2 and 10 mL CH3COOH. c. Digest sample then filter then rinse the precipitate that weighs 0.2857 g. d. Compute for the % purity.Prepare 25, 75 100, 125 and 150 mg/dm3 of Cd(NO3).4H2O in a 500mlPrepare 1000ppm of Cd (NO3).4 H2O in a liter, then preprare from the 1000ppm(which is a stock) 100ppm in 500ml
- Prepare 25ppm of Cd (NO3 )2.4H2O in a 500ml from 1000ppm stock solution of Cd (NO3)2.4H2OA 25.0 cm portion of 0.200, mol dm^-3 sodium ethanedioate solution was warmed and titrated against a solution of potassium manganate(VII). If 17.2 cm^3 of potassium manganate(VII) are required, what is its concentration?What is the total amount of compound you can recover after the first recrystallization of 5g impure N-Bromo succinimide (ca. 5% impurity) if you used 30 mL of water. (NBS solubility in hot water:2g/10mL and cold water 0.25g/10mL).
- Make a schematic diagram for the procedure below: B. % SO3 determination Dry the soluble sulfate sample at 100° C for 1-2 hours, and cool in desiccator. Weigh out 0.5 – 0.7 g (± 0.3 mg) duplicates sample. Transfer to 400-mL beakers. Dissolve each in 200 mL of dist. H2O + 4 mL of 6 m HCl. Precipitant is prepared by dissolving 1.3 g BaCl2 ∙ H2O in 100 mL water. Filter if solution is not perfectly clear. Heat the BaCl2 solution and sulfate sample solution nearly to boiling, and then add the entire amount to the HOT sulfate sample solution while stirring vigorously. Wash stirring rod with distilled water and include washings in your final mixture. Digest by letting stand 1-2 hours. Overnight standing is acceptable. Filter through an ash less filter paper of fine porosity (Whatman no. 42). Slowly pour the supernatant liquid through the filter paper.Tim is interested in analyzing for Pyraclostrobin (pesticide) in strawberries using QuECHers method for extraction and clean up before analysis with HPLC-uv. The concentration of the Pyraclostrobin in the fruits that he sampled is thought to be between 1-10 ng pesticide per g fruit fresh weight. The HPLC-uv instrument he is using has a LoQ of 5 ppb for Pyraclostrobin. Tim is starting out with 500 mg of the sliced fruitFrom a 10-mL sample, a 1-mL aliquot was taken and diluted to 100mL. From this, a 5-mL aliquot was taken and diluted to 20mL.The final 20mL was found to have a concentration of 0.004M analyte X.What is the concentration of analyte X in the 10-mL sample?
