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- Plasma contains more sodium than chloride. How can this be if individual ions of sodium and chloride exactly balance each other out, and plasma is electrically neutral?9. 1.4 g of glucose (C6H1206) is dissolved in 150 ml of water (final volume). What is the final number of moles and the molarity of the solution?What mass of sodium glycolate (NaC2H3O3) should be added to 400.0 mL of 1.00 M glycolic acid to produce a buffer solution with a pH of 4.00? Ka = 1.47 x 10-4. Please indicate the full solutions.
- 80mL of a 0.3M solution of hexapeptide Leu-His-Cys-Glu-Asn-Arg is adjusted to pH=pl. The solution is then titrated with 0.2M HCI to a final pH of 2.1. Sketch the titration curve, labelling the pH and volume axes. Indicate the volume of HCl needed to reach each relevant pKa value and equivalence point(s). Relevant pka values are: 2.1, 4.3, 6.0, 8.3, 9.8, and 12.5.What is the pH of a 0.25 M solution of acetic acid, Ka = 1.8 x 105. What percentage of the acid is dissociated?6.1 A physician asked you to recommend a loading dose and a constant rate IV infusion of a drug to rapidly achieve a steady-state concentration of 15 mg/L. The half-life of this drug is 6 h and the volume of distribution is 30 L. What is your recommendation?
- Calculate the pH of a dilute solution that contains a molar ratio of potassium acetate to acetic acid (pKa 5 4.76) of (a) 2:1; (b) 1:3.If glucose, phosphate, and glucose-6-phosphate arecombined in concentrations of 4.8, 4.8, and 0.25 mM,respectively, what is the equilibrium constant for thehydrolysis of glucose-6-phosphate at a temprature of258C?What mass of sodium glycolate (NaC2H3O3) should be added to 400.0 mL of 1.00 M glycolic acid to produce a buffer solution with a pH of 4.00? Ka = 1.47 x 10-4
- 49.10 Lactic Acid Salicylic Acid 48 5 g 2g Trichloroacetic Acid Flexible Collodion q.s. ad 100 g Sig: wart remover. Use as directed. (a) Flexible collodion contains 20% w/w camphor and 30% w/w castor oil. How many grams of each would be contained in 30 g of the mixture? (b) The specific gravity of castor oil is 0.955. How many milliliters of the oil are contained in 30 g of the mixture? (c) If the specific gravity of the mix- ture is 0.781, what are the w/v con- centrations of lactic acid, salicylic acid, and trichloroacetic acid in the mixture? 49. (a) 5.34 g camphor and 8.01 g castor oil (b) 8.39 mL castor oil (c) 3.12% w/v lactic acid, 3.91% w/v sali- cylic acid, and 1.56% w/v trichloroacetic acidPropanamide and methyl acetate have about the same molar mass, both are quite soluble in water, and yet the boiling point of propanamide is 486 K, whereas that of methyl acetate is 330 K. Explain.10:23 14. Assume you have the following stock solutions: 1 M Tris-HCl (pH 8.0) 0.5 M EDTA (pH 8.0) LTE Perform the calculations and state how would you make 30 mL of TE buffer, which has the following in a single tube: 10 mM Tris-HCl (pH8.0) 1 mM EDTA X
