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The analytical concentration of lactic acid in blood is generally less than 1.20 x 10-4 M, corresponding to the sum of [lactate] and [lactic acid]. During strenuous exercise, however, oxygen in the muscle tissue is depleted, and overproduction of lactic acid occurs. This leads to a condition known as lactic acidosis, which is characterized by elevated blood lactic acid levels (approximately 5.00 x 10-3 M). The pKa of lactic acid is 3.9. a) What is the actual lactic acid concentration...
Lactic acid is a simple organic acid that is somewhat stronger than acetic acid. The lactate ion is the conjugate base of lactic acid and is one product of animal (including human) metabolism. Ka for lactic acid is 1.38 x 10-4. If the resting amount of lactate in blood is 2.0 mM and typical blood pH is 7.40, what is the lactic acid concentration in blood? Calculate the pH of a 0.0100 M solution of lactic acid. Calculate the pH...
A lactic acid solution is prepared by dissolving 0.67 g of lactic acid (HC3H5O3) in 100.00 mL of water. The pH is found to be 2.50. Calculate the Ka for lactic acid.
Lactic acid is produced upon physical activity. The percent composition of lactic acid is 40.0%C, 6.71%H, and 53.3%O. a) Determine the empirical formula of lactic acid. b) If the molar mass of lactic acid is 90.08 g/mol, what is the molecular formula for this compound?
A mixture of lactic acid (pKa 3.86) and ascorbic acid (pKa 11.80) are dissolved in an organic solvent. Which acid can be extracted with solutions of NaOH and NaHCO3? Explain. Which base, NaOH or NaHCO3, should be added first. Explain.
10. (a) Determine the pH of 0.10 M lactic acid (HC3H5O3) (b) What is the pH of a buffer that is 0.12 M lactic acid and 0.10 M sodium lactate (NaC2H5O3)? For lactic acid. Ka - 1.4 x 104. (10) 11. Hydrazine, N2H4, is a weak base. Write the equation for the reaction of hydrazine with water and write the expression for Kb. (5) Na Hj
Is KHP (generally) a better primary standard to use in acid-base titrations than oxalic acid dihydrate? Explain.
Lactic acid, HC3H5O3, has one acidic Hydrogen. A 0.10 M solution of lactic acid has a pH of 2.44. Calculate Ka. ( 4 points )
12. Lactic acid (HC3H5O3) is present in sour milk It is a monoprotic acid. In a 0.100 M solution of lactic acid, the pH is 2.44 at 25°C. Calculate Ka and pKa for lactic acid at that temperature. (10)
2. (a) Determine the pH of 0.10 M lactic acid (HC3HSO3) (b) What is the pH of a buffer that is 0.12 M. lactic acid and 0.10 M sodium lactate (NaC3H5O3)? For lactic acid. Ka = 1.4 x 10-4. (10)