2)250.0 mL of a 0.375 M solution of lactic acid (HC:H:03) is titrated with a solution...
A student performs a titration of 25.0 mL of 0.100 M lactic acid (HC3H5O3), using 0.050 M sodium hydroxide (NaOH). The Ka for lactic acid is 1.4 x 10-4. a) (10 points) What is the pH of the solution after the addition of 23.5 mL of sodium hydroxide solution? b) (4 points) How many milliliters of NaOH are required to reach the equivalence point? c) (4 points) Write the chemical reaction that will determine the pH of the solution at...
An acid-base titration is performed: 250.0 mL of an unknown concentration of HCl(aq) is titrated to the equivalence point with 36.7 mL of a 0.1000 M aqueous solution of NaOH. Which of the following statements is not true of this titration? A. At the equivalence point, the OH−concentration in the solution is 3.67×10−3 M. B. The pH is less than 7 after adding 25 mL of NaOH solution. C. The pH at the equivalence point is 7.00. D. The HCl...
Sulfuric acid (250.0 mL) is titrated with 176.5 mL 2.4 M NaOH to an equivalence point (the point where all the sulfuric acid is exactly neutralized). 2 NaOH + H2SO4 → 2 H2O + Na2SO4 (a) How many moles of sulfuric acid were in the original 250.0 mL? (b) What was the concentration of sulfuric acid in the original 250.0 mL sample?
10 ml containing 1.0 mmole of lactic acid solution, CH3CH(OH)COOH, (pKa=3.86) was titrated with NaOH solution up to a total volume of 100 ml a. what is the concentration of the base solution required for a full neutralization of the lactic acid? b. what is the pH at the equivalent point? c. what will be the pH of the solution obtained after adding 0.2 mmole of NaOH(S) (SOLID!)
. 20.0 mL of 0.100 M lactic acid solution is titrated with 0.100 M NaOH solution. Calculate the pH of the contents of the Erlenmeyer flask at each of the following points during the titration. (a) When 0.00 mL of NaOH have been added. (2) (b) After 5.00 mL of NaOH have been added. (3) (c) After 20.0 mL of NaOH have been added. (3) (d) After 10.0 mL of NaOH have been added. (1) (e) After 25.0 mL of...
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...
7 A 25.00 ml acetic acid solution is trated with 0.110 M NaOH. The end point is reached after 18.55 mL NaOH has been added. a. What was the original concentration of acetic acid? 5 pts bWhat is the initial pH of the acetic acid solution? 5 pts was the plh after the adition of 5.00 mL NaOH to the original solution? 5 pts d. What is the pH at the equivalence point? 5 pts e. What is the pH...
A 100.0 mL sample of an aqueous H2SO4 solution is titrated with a 0.375 M NaOH solution. The equivalence point is reached with 92.5 mL of the NaOH solution. The concentration of H2SO4 is M OA 0.234 OB.0.469 OC0.150 OD.0.347 O E 0.938
A lactic acid/lactate ion buffer solution contains 0.43 MHC3H5 03 and 0.80 MC,H50,-, respectively. The Ka value of lactic acid is 1.4 × 10-4. Calculate the pH of this buffer. Express the pH numerically.
2. A sample of 50 ml of nitrous acid (KA = 5.6 x 10“) is titrated with 0.070 M NaOH. The equivalence point is reached after the addition of 43.2 ml of the strong base. a) (3 marks) What is the pH of the solution at the equivalence point? b) (3 marks) What is the pH of the solution after 50 ml of NaOH has been added to the original nitrous acid solution?