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- If 850 mL of syrup with a specific gravity of 1.5 contains 500 g of sucrose, what is itspercentage strength (w/w)?Weight of crude acetanilide = 2.2 grams Weight of pure acetanilide = 1.5 grams Melting point of recrystallized acetanilide = 114.3 C (a) What is the % yield? (b) What is the % purity?A 0.9000-g of KIO3 is dissolved in 500-mL distilled water. A 50.0-mL aliquot portion was run down into an Erlenmeyer flask and 2-g of KI and 2-mL of 6M HCl were added to it. Directly after, the solution was titrated with a 24.80-mL Na2S2O3 solution to a faint yellow solution. Starch TS was added to the resulting solution and the titration with the Na2S2O3 solution continued wherein an additional 1.33-mL was required to bring the blue color of the solution to disappear completely. MW: KIO3 = 214.0 g/mol ; Na2S2O3 = 158.1 g/mol Compute the N of the Na2S2O3 solution. None of the choices 0.09657 N 0.1075 N 0.1017 N
- A 0.9134-g of KIO3 is dissolved in 500-mL distilled water. A 50.0-mL aliquot portion was run down into an Erlenmeyer flask and 2-g of KI and 2-mL of 6M HCl were added to it. Directly after, the solution was titrated with a 24.47-mL Na2S2O3 solution to a faint yellow solution. Starch TS was added to the resulting solution and the titration with the Na2S2O3 solution continued wherein an additional 1.33-mL was required to bring the blue color of the solution to disappear completely. MW: KIO3 = 214.0 g/mol ; Na2S2O3 = 158.1 g/mol Compute the M of the Na2S2O3 solution. 0.1047 M None of the choices 0.1107 M 0.09926 Mwhen 2.0 of NaOHCO3 was heated the weight of the reside product after heating was 1.0g calculate the percent weight loss on heatingChloroform liniment contains 30% (v/v) of chloroform. How many mL of chloroform liniment can be prepared from 1 lb (AV) of chloroform (sp gr. 1.475)?
- What is the final concentration of hydrocortisone in the mixture, as a ratio strength, if 5 g of hydrocortisone 2.5 % (w/w) ointment is added to 75 g of petroleum jelly? Round denominator of ratio strength to a whole number2-Methylcyclohexanol (5 mL, d=0.929g g/ml, MW= 114.19) was heated under reflux with 5mL of 85% phosphoric acid. What is the theoretical yield of the product for this reaction? a) 4.5 g b) 3.9g c) 3.2g d) 2.9g e) 2.5gPrepare 750 mL of 6.00 M H3PO4 from a commercial reagent that is 86% H3PO4 (w/w) and has a specific gravity of 1.71
- A prednisolone solution contains 15 mg prednisolone per 10 mL. What is the percentage strength (w/v) of the prednisolone in this prescription? (Answer must be numeric; no units or commas; round the final answer to the nearest HUNDRETH.)A 500.00 mg vitamin C (MW176.12g/mol) tablet was ground, acidified, and dissolved in H2O to make a 250.0 mL solution. A 50.00 mL aliquot containing vitamin C, KI and starch was analyzed and titrated with 12.31 mL of 0.01042 M KIO3. What is the % (w/w) vitamin C in the tablet? KIO3 + 5 KI + 6 H+ = 3 I2 + 6 K+ + 3 H2O C6H8O6 + I2 = C6H6O6 + 2I- + 2H+ A 67.77 % B 33.89 % C 22.59 % D 3.39 %Volume of acetic anhydride: 2.98 mL Mass of salicylic acid: 1.00 g Mass of aspirin recovered: 0.67 g Show that mmol of aspirin recovered divided by mmol of limiting reagent x 100% gives the same % yield (please explain) Thank you.