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- Describe how to prepare 100 mL of approximately 60% (w/v) NaOH from solid NaOHHow efficient is the extraction of caffeine from tea leaves containing 1.0 g caffeine in 80 ml aqueous extract with two 30-ml portions of dichloromethane over that of a single-step extraction (K at 25°C = 8.36)?How efficient is the extraction of alkaloid from tea leaves containing 1.0g alkaloids in 80mL aqueous extract with two 30mL portions of chloroform over that of a single-step extraction K25 °C=8.36?
- Describe the preparation of 500 mL of 0.0750 M AgNO3 from the solid reagent.How you would quantify the concentration (%v/v) of the glacial acetic acid assuming you use 50g sodium acetate and 75mL sulfuric acid as the reagents in the experiment.Is there a difference when the needle or metal clip is placed on the surface of distilled water with dilute amounts of liquid detergent? Explain your observations in terms of the strength of IMFA present in each condition.
- How will the calculated solubility product for calcium hydroxide be affected if the mixture of solid Ca(OH)2 and deionized water was not prepared far enough in advance, so that Ca(OH)2 soultion was not saturated?7. A student weighed 4.010 g of methyl benzoate into the reaction flask and began the nitration experiment using a chilled mixture of 1 ml of 16 M HNO3 and 1 mL of 18 M H 2 SO 4 in 8 of ice cold H 2 SO 4 Calculate the theoretical yield for this experiment (show ALL calculations )What is the minimum distribution constant that permits removal of 99% of a solute from 50.0 mL of water with two 25.0-mL extractions with toluene? five 10.0-mL extractions with toluene?
- What would be the concentration of isopropyl alcohol if 50 ml of rubbing alochol was diluted to 350 ml of distilled water? A rubbing alcohol usually contains 70% (v/v) isopropyl alcoholThe distribution coefficient, k for a compound “A” between hexane and water is 7.5. What weight of A would be removed from a solution of 10 g of A in 100 mL of water by a single 100 mL extraction with hexane?4 what are some real life examples of thermodynamic studies of Dissolution of Urea? How can this be used in everyday life?