The following data give the constant dissociation, Ka (for acetic acid at various temperatures): T(∘C) Ka...
The following data give the constant dissociation, Ka (for acetic acid at various temperatures):
| T(∘C) | Ka |
| 0 | 1.657×10−5 |
| 10 | 1.729×10−5 |
| 15 | 1.745×10−5 |
| 25 | 1.753×10−5 |
Using the information that lnK versus 1/T is a straight line with slope −ΔH∘/R, calculate ΔH∘ for the ionization of acetic acid.
Homework Answers
Add Answer to:
The following data give the constant dissociation, Ka (for
acetic acid at various temperatures):
T(∘C)
Ka...
The acid dissociation constant of acetic acid is Ka = 1.74x10-5. (a) How much does the...
The acid dissociation constant of acetic acid is Ka = 1.74x10-5. (a) How much does the pH value of 10 mL 0.05 M acetic acid solution change if we add 40 mL 1.25 x10-2 M Na-acetate solution to it? (b) How many mL of a 0.05 M NaOH solution must be added to the acetic acid solution above in order to change the pH value by exactly 1 unit?
Determination of the Dissociation Constant ka, of a Weak Acid Part A Phosphoric acid is a...
Determination of the Dissociation Constant ka, of a Weak Acid Part A Phosphoric acid is a triprotic acid (three ionizable hydrogens). The values of its stepwise ionization constants are Kit = 75 x 10°,K6.2 x10, and K. = 4.2 x 10" 1. Write the chemical equation for the first ionization reaction of phosphoric acid with water. 2. Write the equilibrium constant expression Kat for this reaction. 3. What would be the pH of a solution when [H,PO) -(H.PO:] Part B...
#3 (a) HA (aq) is a weak acid with a dissociation constant, Ka, of 2.0 x...
#3 (a) HA (aq) is a weak acid with a dissociation constant, Ka, of 2.0 x 10-15. What is the pH of a 0.04 M solution in A- (aq)? The temperature is 25oC. (b) For the reaction A (g) ⇋ B (g) + C (g), the equilibrium constant is 2 at 25.0oC and 3 at 75.0oC. Making the approximation that ΔH and ΔS do not change with temperature, calculate the value of the equilibrium constant at 50.0oC as well as...
12. If the acetic acid dissociation constant is 1.8 X 10-5 Ka, and its concentration before...
12. If the acetic acid dissociation constant is 1.8 X 10-5 Ka, and its concentration before dissociation (0.15M), the concentration of H+] is equal to the following equilibrium equation. CH,COOH = CH.COO+H* B) 6.41 X 104 C)2.62 X 104 D)1.64 X 10 13. When dissolved (1.93 g) of HNO, acid (MW=47) and dilute the volume to 500 ml the H concentration in the solution was 7.63X10 M, the value of the dissociation constant Ka was equal to : A) 8...
( 2 Chem 125 Laboratory The Dissociation Constant (K.) of Acetic Acid(HA) DATA and CALCULATIONS A...
( 2 Chem 125 Laboratory The Dissociation Constant (K.) of Acetic Acid(HA) DATA and CALCULATIONS A 1.0 MHA PH 2.30 corresponding (H2O*), compute the concentrations of A and HA, and calculate Calculate the corresponding [HOT.com the ionization constant,K Show all your work. pH = -log CH₂ot [H,0) COSM 2. 30 = log [H + 10-230-Ht Σ (A) Ph [HA] K. = [H,0*)[A]/[HA]
Ionization Constant for Acetic Acid Ka = 1.85 x 10-5 HC2H2O2(aq) + H200 z H30+(aq) +...
Ionization Constant for Acetic Acid Ka = 1.85 x 10-5 HC2H2O2(aq) + H200 z H30+(aq) + C2H3027 (aq) A solution is 0.100 M in acetic acid and 0.100 M in NaC2H302. What is the [H+] ? (A) (C) 1.85 x 10-5 M 0.100 M 1.36 x 10-3 M 0.200 M (D)
For the following dissociation of acetic acid, Ka = 1.760 x 10-5: CH3COOH + H2O ?...
For the following dissociation of acetic acid, Ka = 1.760 x 10-5: CH3COOH + H2O ? CH3COO- + H3O+ Sodium acetate completely dissociates in solution according to the following reaction: NaCH3COO ? Na+ + CH3COO- A solution was prepared which contains CH3COOH at a pre-equilibrium concentration of 0.05782 M and NaCH3COO at a pre-equilibrium concentration of 0.04991 M. I know all answers, just do not know how to find them. What is the equilibrium concentration of H3O+? (Answer: 0.00002037) What...
cace). The Ka for acetic acid. HCHO(ag) is 1.8 X 10 at 25°C Write the chemical...
cace). The Ka for acetic acid. HCHO(ag) is 1.8 X 10 at 25°C Write the chemical reaction that chemical reaction that describes the dissociation of acetic acid. C2 1 2 0 2 (aq) + H3 1 C2 H 3 O 2 caq) + H 2 O (1) Given the following standard enthalpies of formation Substance AH® (kJ/mol) (T= 25°C) HC2H3O2(aq) -485.76 C2H302 (aq) -486.01 H(aq) Calculate the K, at 35 °C. Qualitatively, how would expect the pH of a solution...
CHM2046L: General Chemistry and Oualitative Analysis II; Fall 2019 Equilibrium: Determination of Acid Ionization Constant (Ka)...
CHM2046L: General Chemistry and Oualitative Analysis II; Fall 2019 Equilibrium: Determination of Acid Ionization Constant (Ka) of a Weak Acid) (Post-lab # 8: Due Thursday 10-31", 2019) Last name First Name 1. Determine the pH of a 0.023 M HNO3 solution. 2. Calculate the concentration of H30 in a solution that contains 5.5 x 10-5 MOH at 25°C. Identify the solution as acidic, basic, or neutral. 3. Determine the [H30°) in a 0.265 M HCIO solution. The K, of HCIO...
7.Calculate the amounts of the required chemicals for preparing the following acetic acid/acetate buffer solution and its pH values. Please give detail steps of your calculation and use proper signif...
7.Calculate the amounts of the required chemicals for preparing the following acetic acid/acetate buffer solution and its pH values. Please give detail steps of your calculation and use proper significant numbers. No points will be given if only answers are given without detail and reasonable calculations (subtotal 15 pts): A. In the first step, if you are required to prepare a 2.00M sodium acetate in 200.0 mL distilled water, how many grams of sodium acetate should be added in 200...
Determination of the Dissociation Constant ka, of a Weak Acid Part A Phosphoric acid is a triprotic acid (three ionizable hydrogens). The values of its stepwise ionization constants are Kit = 75 x 10°,K6.2 x10, and K. = 4.2 x 10" 1. Write the chemical equation for the first ionization reaction of phosphoric acid with water. 2. Write the equilibrium constant expression Kat for this reaction. 3. What would be the pH of a solution when [H,PO) -(H.PO:] Part B...
12. If the acetic acid dissociation constant is 1.8 X 10-5 Ka, and its concentration before dissociation (0.15M), the concentration of H+] is equal to the following equilibrium equation. CH,COOH = CH.COO+H* B) 6.41 X 104 C)2.62 X 104 D)1.64 X 10 13. When dissolved (1.93 g) of HNO, acid (MW=47) and dilute the volume to 500 ml the H concentration in the solution was 7.63X10 M, the value of the dissociation constant Ka was equal to : A) 8...
( 2 Chem 125 Laboratory The Dissociation Constant (K.) of Acetic Acid(HA) DATA and CALCULATIONS A 1.0 MHA PH 2.30 corresponding (H2O*), compute the concentrations of A and HA, and calculate Calculate the corresponding [HOT.com the ionization constant,K Show all your work. pH = -log CH₂ot [H,0) COSM 2. 30 = log [H + 10-230-Ht Σ (A) Ph [HA] K. = [H,0*)[A]/[HA]
Ionization Constant for Acetic Acid Ka = 1.85 x 10-5 HC2H2O2(aq) + H200 z H30+(aq) + C2H3027 (aq) A solution is 0.100 M in acetic acid and 0.100 M in NaC2H302. What is the [H+] ? (A) (C) 1.85 x 10-5 M 0.100 M 1.36 x 10-3 M 0.200 M (D)
cace). The Ka for acetic acid. HCHO(ag) is 1.8 X 10 at 25°C Write the chemical reaction that chemical reaction that describes the dissociation of acetic acid. C2 1 2 0 2 (aq) + H3 1 C2 H 3 O 2 caq) + H 2 O (1) Given the following standard enthalpies of formation Substance AH® (kJ/mol) (T= 25°C) HC2H3O2(aq) -485.76 C2H302 (aq) -486.01 H(aq) Calculate the K, at 35 °C. Qualitatively, how would expect the pH of a solution...
CHM2046L: General Chemistry and Oualitative Analysis II; Fall 2019 Equilibrium: Determination of Acid Ionization Constant (Ka) of a Weak Acid) (Post-lab # 8: Due Thursday 10-31", 2019) Last name First Name 1. Determine the pH of a 0.023 M HNO3 solution. 2. Calculate the concentration of H30 in a solution that contains 5.5 x 10-5 MOH at 25°C. Identify the solution as acidic, basic, or neutral. 3. Determine the [H30°) in a 0.265 M HCIO solution. The K, of HCIO...
7.Calculate the amounts of the required chemicals for preparing the following acetic acid/acetate buffer solution and its pH values. Please give detail steps of your calculation and use proper significant numbers. No points will be given if only answers are given without detail and reasonable calculations (subtotal 15 pts): A. In the first step, if you are required to prepare a 2.00M sodium acetate in 200.0 mL distilled water, how many grams of sodium acetate should be added in 200...
Most questions answered within 3 hours.
-
convert grams into vloume with the density of water being at
.997514 g/cm^3 at 23.1 Celsuis...
asked 1 hour ago -
Foreman company obtained a $20,000, 6% loan on May 1, 2018.
Principal and interest will be...
asked 1 hour ago -
5. Problem 11.05 (Discounted Payback)
eBook
Project L costs $60,000, its expected cash inflows are $14,000
per...
asked 2 hours ago -
1. Which of the following is true about politics and health
organizations?
A. Health organizations are...
asked 2 hours ago -
A space vehicle is coasting at a constant velocity of 18.1 m/s
in the +y direction...
asked 3 hours ago -
5) Use the following balanced equation to answer questions
(a)-(i).
3 Cu(s) + 8 HNO3(aq) →...
asked 3 hours ago -
A three-year maturity bond with a 12% annual coupon rate is
currently traded at par $1000...
asked 3 hours ago -
1.
What is the minimum volume to use in the Spec 20 cuvette in order
to...
asked 3 hours ago -
A builder wants to install wall-to-wall carpeting in a living
room of length 8.87 m and...
asked 3 hours ago -
Organizational change can produce anxiety in those affected by
the change. In what ways can change...
asked 3 hours ago -
Ozone in the atmosphere may react with nitric oxide.
From the following data, calculate the DG...
asked 3 hours ago -
Steven Long, a bond analyst, is analyzing a convertible bond.
The characteristics of the bond are...
asked 3 hours ago