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- You have a 0.05M stock solution of NaCI (Formula Weight: 58.4g/mole), a 0.25Mstock solution of glucose (Formula Weight; 180.2g/mole), and a bottle of solid Tris base (FormulaWeight: 121.1g/mole). How would prepare (be specific) 150mL of a single solution containing75mM Tris, 15mM glucose, and 5mM NaCl.A 0.1220 g vitamin C tablet was dissolved in acid. This required 11.50 mL of 0.01740 M KIO3 to reach the endpoint. Calculate percent by weight of ascorbic acid in the tablet.6. You have a 0.5M stock solution of NaCI (Formula Weight: 58.4g/mole), a 250mM stock solution of glucose (Formula Weight; 180.2g/mole), and a bottle of solid Tris base Formula Weight: 121.1g/mole). How would prepare (be specific) 250mL of a single solution containing 150mM Tris, 0.025M glucose, and 50mM NaCI.
- A 0.1220 g vitamin C tablet was dissolved in acid. This required 11.50 mL of 0.01740 M KIO, to reach the endpoint. Calculate percent by weight of ascorbic acid in the tablet.At an air-water interface, fatty acids such as oleic acid liein a one-molecule-thick layer (monolayer), with the heads in thewater and the tails perpendicular in the air. When 2.50 mg of oleic acid is placed on a water surface, it forms a circular mono-layer 38.6 cm in diameter. Find the surface area (in cm²) occu-pied by one molecule (of oleic acid M=283 g/mol).What is the concentration in units of grams of dye per liter of solution ,of the dilute dye solution that is produced as follows? transfer 19.53 ml of stick solution (6.10g/L) to a 200.0Ml volumetric flask and dilute to the 200 ml line with deionized water. Correct number of significant figs
- the equation for osmotic pressure is P = iRTC i = # of ions dissociated R = Gas constant of 0.082 L-atm/degM T = temperature in Kelvin C = concentration gradient in moles two eggs are incubated in two separate solutions. Egg one is incubated in 0.9% saline solution and egg two is incubated in 20% glucose solution. the eggs are then transferred to 800mL of distilled water. What is the initial osmotic pressure for each solution?An automobile antifreeze mixture is made by mixing equal volumes of ethylene glycol (SG= 1.114; MW = 62.07 g/mole) and water at 20oC. The density of the mixture is 1.070 g/mL. Express the concentration of ethylene glycol as:a) Volume percentb) Mass percentc) Molarityd) Molalitye) Mole fractionOver 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?
- What volume of Water for Injection, BP is to be added to a vial containing 500 mg amoxicillin to produce a solution with a volume of 10 mL. The displacement volume of amoxicillin is 0.5ml for 125mg.Answers should be in 4th decimal places An automobile antifreeze mixture is made by mixing equal volumes of ethylene glycol (SG=1.114; MW = 62.07 g/mole) and water at 20oC. The density of the mixture is 1.070 g/mL. Express the concentration of ethylene glycol asa) Volume percentb) Mass percentc) Molarityd) Molalitye) Mole fractionC7H21O4NHCl(aq) + NaOH(aq) ---> C17H21O4N(aq) + H2O (l) + NaCl(aq) When a 25mL of aqueous solution that contains 62.50g of the salt is treated with NaOH, the salt is converted to pure cocaine. How much water in litres is needed additionally to dissolve the formed pure cocaine?