Problem 15.50
The equilibrium constant Kn for the neutralization of lactic acid (HC3H5O3) and urea (CH4N2O) is 2.1�10?4.
Part A
What is Kb for urea? Ka of lactic acid is 1.4�10?4.
Express your answer using two significant figures.
|
|||||||
Kb = |
Problem 15.50 The equilibrium constant Kn for the neutralization of lactic acid (HC3H5O3) and urea (CH4N2O)...
Lactic acid, HC3H5O3 , is a weak acid in aqueous solution, Ka = 1.4 × 10−4 . Calculate Kb for the lactate ion, C3H5O –
Part A The equilibrium constant Kn for the neutralization of boric acid (H3BO3) and caffeine (C8H10N4O2) is 24. What is Kb for caffeine? (Ka of boric acid is 5.8⋅10−10).
1. Consider the following equilibrium for the dissociation of lactic acid, HC3H5O3 (a weak acid): HC3H5O3 (aq) + H2O (l) → H3O+ (aq) + C3H5O3- (aq) If the Ka of lactic acid is 1.40E-4, calculate the value of ΔGo (in kJ/mole) for this reaction at 25.0oC.
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
The Ka of lactic acid, HC3H5O3, is 1.4 ✕ 10−4. (a) Suppose buffer #1 is prepared using 40.0 mL 0.1 M HC3H5O3 and 60.0 mL 0.1 M C3H5O3− to give a final volume of 100.0 mL. What is the pH of this buffer? WebAssign will check your answer for the correct number of significant figures. 4.19 Incorrect: Your answer is incorrect. (b) Suppose a buffer #2 is prepared using 60.0 mL 0.1 M HC3H5O3 and 40.0 mL 0.1 M C3H5O3−...
A buffer solution is made such that the initial concentrations of lactic acid (HC3H5O3) and the lactate ion (C3H5O3-) are both 0.600 M. What is the resulting pH if 10.0 mL of 1.00 M HCL is added to 0.500 of the buffer solution? (ka of HC3H5O3= 1.4 x 10^-4)
Exercise 7.59 Part A Urea (CH4N2O) is a common fertilizer that can be synthesized by the reaction of ammonia (NH3) with carbon dioxide as follows 2 NH3(aq) +CO2(aq)CH,N2O(a) H2() In an industrial synthesis of urea, a chemist combines 128.7 kg of ammonia with 211.4 kg of carbon dioxide and obtains 178.7 kg of urea Determine the limiting reactant Express your answer as a chemical formula Submit es ns Part B Determine the theoretical yield of urea Express your answer using...
Lactic acid (CH3CH(OH)COOH) has one acidic hydrogen. A 0.10 M solution of lactic acid has a pH of 2.44. Calculate Ka. Express your answer using two significant figures. Ka= Please show all work thanks
11a) 1.00 moles of lactic acid (HC3H5O3, Ka = 1.4 x 10-4) and 1.00 moles of sodium lactate (NaC3H5O3) are dissolved in water resulting in a solution with a final volume of 550 mL. What is the pH of the solution after the addition of 0.080 moles of HCI? a. 0.80 b. 1.8 C. 2.8 d. 3.8
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...