4.8 Calculate the amount of salt which is equivalent to 250 mg of quinidine sulphate dihydrate ((C20H24N₂O2)2 H₂SO4.2H₂O): (a) Quinidine bisulphate (C₂0H24N₂O₂.H₂SO₂) (b) Quinidine gluconate (C20H24N₂O₂.C6H₁2O7)
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- Over time, as their free fatty acid (FFA) content increases,edible fats and oils become rancid. To measure rancidity, the fator oil is dissolved in ethanol, and any FFA present is titrated withKOH dissolved in ethanol. In a series of tests on olive oil, a stocksolution of 0.050 Methanolic KOH was prepared at 25C, storedat 0C, and then placed in a 100-mL buret to titrate any oleic acid[CH₃(CH₂)₇CH=CH(CH₂)₇COOH] present in the oil. Each offour 10.00-g samples of oil took several minutes to titrate: thefirst required 19.60 mL, the second 19.80 mL, and the third and fourth 20.00 mL of the ethanolic KOH.(a) What is the apparent acidity of each sample, in terms of mass% of oleic acid? (Note:As the ethanolic KOH warms in the bu-ret, its volume increases by a factor of 0.00104/C.)(b) Is the variation in acidity a random or systematic error? Ex-plain.(c) What is the actual acidity? How would you demonstrate this?Drug A dissociates into four ions to the extent of 70%. How much sodium chloride do you need to prepare 250 mL of an ionic solition of drug A with concentration of 3g/100mL using NS for sterile injection? MW of Drug A= 892.54 (assume final volume will be qs with sterile water for injection) a. 155.9 ml NaCl b. 62.37 mL NaCl c. 146.6 mL NaCl d. 218.33 mL NaClI. Expressions of Concentration1. Calculate the sodium content, in terms of mEq, of 1 g of ampicillin sodium (C6H18N3NaO4S).2. A pharmacist dissolves the contents of eight (8) pcs of Clindamycin 250 mg capsules, into a sufficientamount of astringent to prepare 120mL of solution. What is the percentage strength (w/v) of clindamycinin the prescription?3. How many milliliters of a solute should be used to prepare 1 pint of a 15% (v/v) lotion?4. What is the molarity of a solution that is prepared by dissolving 10g Potassium chloride in enough water tomake 500mL of solution?5. Express in percentage the fluoride concentration in drinking water given in 0.6 ppm.
- Calculate the molar concentration of a thiosulfate solution from the following information:A 40.-mL aliquot of a 0.00653 M KIO3 solution is added to a flask containing 2 g of KI and 10 mL of 0.5 M H2SO4. The resulting solution is titrated to a starch endpoint with 38 mL of the thiosulfate solution.What are the respective concentrations (M) of Cu2+ and Cl- afforded by dissolving 0.637mol0.637mol CuCl2 in water and diluting to 289mL?289mL? What are the respective concentrations (M) of Cu2+ and Cl- afforded by dissolving CuCl2 in water and diluting to 0.454 and 0.092 2.20 and 2.20 2.20 and 4.41 0.00220 and 0.00220 0.00220 and 2.20What mass (in grams) of Na2S2O3 is needed to dissolve 0.44 g of AgBr in a solution volume of 1.0 L, given that Ksp for AgBr is 3.3×10−13 and Kf for [Ag(S2O3)2]3− is 4.7×1013?
- In an experimental study of membrane-like assemblies of synthetic materials, a phase diagram like that shown was obtained. The two components are dielaidoylphosphatidylcholine (DEL) and dipalmitoylphosphatidylcholineIDPU. Explain what happens as a liquid mixture of composition xDel = 0.5 is cooled from 45 °C.Calculate NaCl equivalent of a 1% solution of pilocarpine nitrate. Pilocarpine nitrate has molecular weight of 271 and i of 1.8 (Give clear handwritten answer)Stoichiometric calculations. (show computations)K, a pharmaceutical scientist aims to synthesize paracetamol by reacting 3.075 mg of p-aminophenol and 2.25 milliliters of acetic anhydride to produce paracetamol and acetic acid. C6H7NO + C4H6O3 à C8H9NO2 + C2H4O2 Is the chemical reaction balanced? If yes, write YES. If not, what should be the balanced equation? What is the molecular weight of p-aminophenol? What is the molecular weight of acetic anhydride? What is the molecular weight of paracetamol? What is the limiting reactant? How many grams of paracetamol was formed? K was able to produce 1.88 grams of paracetamol. What is the percentage yield?
- 2. A pharmacist dissolves the contents of eight (8) pcs of Clindamycin 250 mg capsules, into a sufficient amount of astringent to prepare 120mL of solution. What is the percentage strength (w/v) of clindamycinin the prescription? 3. How many milliliters of a solute should be used to prepare 1 pint of a 15% (v/v) lotion? 4. What is the molarity of a solution that is prepared by dissolving 10g Potassium chloride in enough water tomake 500mL of solution? 5. Express in percentage the fluoride concentration in drinking water given in 0.6 ppm. i need help:(( with complete solution pls3What is the ratio strength of benzalkonium chloride in a nasal spray that contains 125 µg/mL of the ingredient? a 1:8 b 1:80 c 1:800 d 1:8000One litre of a saturated aqueous solution of Ag2SO4 (MW = 311.79 g mol- 1) at 25 °C is evaporated to dryness. 4.844 g of Ag2SO4 residue was produced. What is the solubility product (Ksp)?