Consider 15 mL of an aqueous solution containing 2.0 g of an organic solute. If the distribution coefficient for the solute between ether and water is 20, calculate the percent of the compound that can be recovered with a single extraction with 28.6 mL of ether.
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- What weight of the soda ash (impure Na2CO3) should be taken for analysis in order that the number of milliliters of 0.500 N acid used will be equal to one-half of the percentage of Na2CO3 in the sample? Note: Please include the complete solution. Thanks!A sample is analyzed for chloride using the Volhard method. What is the percentage chloride as NaCl using the following data? Weight of sample: 303.0 mg AgNO3 used: 40.00 mL of 0.1234 M KSCN used: 12.20 mL of 0.0930 MConsider 15 mL of an aqueous solution containing 2.0 g of an organic solute. If the distribution coefficient for the solute between ether and water is 20, calculate the percent of the compound that can be recovered with a single extraction with 13.3 mL of ether. to two significant figures.
- Please determine how to make a working standard Solution of about 0.010mg/mL. Caffeine will be the active. Diluent will be water.why would you add 10 mL of concentrate to 490 mL of water if you were instructed to dilute the concentrate 1:50 with water and you were was using a bottle with a 500 mL capacityPleas help! I don’t know how to calculate this question. In this experiment, 0.070g of caffeine is dissolved in 4.0mL of water. The caffeine is extracted from the aqueous solution three times with 2.0mL portions of methylene chloride. Calculate the total amount of caffeine that can be extracted into the three portions of methylene chloride. Caffeine has a distribution coefficient of 4.6, between methylene chloride and water.
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- 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…A compound has a distribution coefficient of 14 between water and diethylether. If 350 mg are present in 100 mL water, how many mL of diethylether is needed to extract 90% of the compound in a single extraction?Blood added with 25 ml distilled water + submerged in a water bath, added 1-2 drops of 10% acetic acid = brownish precipitate The brown precipitate was then filtered. Then heated in an evaporating dish until it turned to black ash (organic matter has been burned out). It was then cooled then added 2 to 3 ml of 10% HCl solution and 5% Potassium Thiocyanate solution. Result: bright red solution formed.What is the chemical equation?