Make an outline or schematic diagram of the procedure to effectively separate the components of the following mixtures: 1. sawdust and iron filing 2. alcohol and water 3. flour, sand and.sulfur 4. alloy of copper.and zinc. 35
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- Case: A prescription for calls for compounding 60 mL of an oral solution for patient A. This oral solution contains 45 mg of salicylic acid. The pharmacist decides to weigh this on a balance with a minimum weighable quantity of 120 mg and dissolve it an appropriate solvent to prepare the solution. Answer the following questions to explain how you will use the liquid measurement aliquot method to obtain the correct amount of salicylic acid to prepare this solution. When making this preparation, you want to minimize the amount of salicylic acid that is wasted. The prescription is as follows: Rx Salicylic acid 45 mg Cherry flavor solution 5 mL Ora-Syrupee qs 60 mL What is the target amount of salicylic acid for the liquid aliquot that will be used to make the 60 mL oral solution? What is the maximum volume of the liquid aliquot can be used to make this preparation? If you weigh 120 mg of…In each scenario, describe a step by step process in determining the unknown. Distilled water maybe present in all scenarios along with the sample. Scenario 1: Determining the density of liquid Apparatus given: Graduated cylinder Lab equipment : Digital balance Scenario 2: Determining the Density of Solid Apparatus given: Graduated cylinder, beaker Lab Equipment : Digital balance500mM K2Cr2O7 solution (0.500 mol/L) About 36.775 g of K2Cr2O7 (MM = 294.20 g/mol) was weighed on an analytical balance on an analytical balance. It was quantitatively transferred to a 250 mL volumetric flask, dissolved with distilled water, completed the volume is up to the mark and homogenized. How many milliliters (total) of the stock solution was used to prepare these solutions from the previous question?
- Concentration of AR Stock Solution (ppmppm) 21.22 Unrounded Rounded Concentration of AR Stock Solution (μMμM) 42.7461 42.7The control of the pesticides residue in fruits and vegetables has been emphasized by the standard office. Organophosphates are a group of common pesticides. Which pre-concentration method do you suggest to extract these compounds from the tomato sample? State your reasons.B. Determining the Composition of a Mixture of Sodium Chloride and Sodium Nitrate Partner I Prepare a solution of sodium chloride + sodium nitrate and indicator. Obtain a dropper bottle of potassium chromate (indicator) solution. To a clean and dry 125 mL Erlenmeyer flask, add about 40 mL of water and 8 drops of indicator solution. Weigh out approximately 0.05 grams of sodium chloride + sodium nitrate solid and record its exact mass. Dissolve the solid in the solution from step 1, stirring with a stirring rod to ensure complete dissolution. Determine and record the total mass of the Erlenmeyer flask and solution, noting the balance that you use to weigh. Rather than measuring the volume of silver nitrate solution added as in Part A, we will measure the mass of titrant added and make use of the weight-percentage concentration of silver nitrate in calculations. Prepare the silver nitrate solution. Obtain about 15 mL of 1.70% w/w silver nitrate solution in a 50 mL beaker. Designate a…
- 1. List the precautions to be taken to keep a balance functioning correctly. 2 What is the most accurate reading when weighing a solid ? 3. Why cant large crystal be used for melting point determination ? 4. When using melting point to assess purity, how would you know that your sample is impure ?What are the types of gravimetric methods? Give an examples where each method is used in an analysis. What is particulate gravimetry? When do we use this technique?Pleas don't provide handwritten solution .....
- Which two statements are correct? a) The normality of the K2Cr2O7 solution is 0.41 N b) The normality of the K2Cr2O7 solution is 0.82 N c) The normality of the K2Cr2O7 solution is 0.0136 N d) When the equation is properly balanced the coefficient of Fe2 is 3 e) When the equation is properly balanced, coeffic H2O is F) When the equation is properly balanced, the coefficient of Cr3 + is 2Aspirin yield You record the following data during the Qualitative and Quantitative Characterization of Aspirin experiment: Mass of beaker and filter paper: 63.189 g Mass of beaker, filter paper, and solid: 63.525 g In 0.215 g of this solid, you calculated that there was 0.188 g of aspirin and 0.027 g of salicylic acid. 7.) Calculate the percent aspirin by mass of the solid. (Do not enter the percent sign with your answer.)Complete the table by entering the molarity of B2- for each standard solution. Show an illustrative calculation for tube ‘A’. Use the dilution formula and express each result to one more digit than allowed by applying the rules of significant figures. Standard Volume of stock B2- solution taken, mL Molarity of dilute B2 Construct a graph of Absorbance vs. molarity of B2- in Excel using the data in the preceding table. Make certain to title the graph and include axes labels with proper units. Absorbance is dimensionless (has no unit). Add a linear trendline to the graph but do not set the y-intercept to zero Solid M2B is added to 25 mL of water, the resulting mixture is continually stirred for 1 hour. At this point, it is assumed that equilibrium (eqn 3) has been established. The mixture is transferred to a test tube, and the test tube is centrifuged to assure that any residual solid M2B is fully settled out. A portion of the supernatant in the test tube is carefully…