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24.5 24.9 5.49 6.20 34 36 2.1 12.2 12.26 Determine K, for the unknown acid 2....
Determine K, for the unknown acid. 4. What is the pH of the solution that results...
Determine K, for the unknown acid. 4. What is the pH of the solution that results when 25.0 mL of 0.125 M NaOH is added to 25.0 mL of 0.250 M на? 5. What is the pH of a solution that is 0.40 M in sodium acetate and 0.60 M on acetic acid? (K, for acetic acid is 1.85 x 10%
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...
6) At 25 C, the K, for formic acid (HCO2H) is 1.8 x 10-4. What is...
6) At 25 C, the K, for formic acid (HCO2H) is 1.8 x 10-4. What is the pH of a 0.10 M aqueous solution of lithium formate (LiHCO2)? 7) What is the pH (aq., 25 °C) of this solution: adding 1.64 grams of sodium acetate to give 200.0 ml solution at 25.0°C? The K, at 25.0°C for acetic acid is 1.8 x 10-5.
0 Mava=mV6 XvP Soma = Moub - Vaan. Determination of the castante Weak Acid D. Concentration...
0 Mava=mV6 XvP Soma = Moub - Vaan. Determination of the castante Weak Acid D. Concentration of Unknown Acid Trial 3 - Trial Trial Volume of unknown acid Average molarity of NaOH from above mL of NaOH at equivalence point Molarity of unknown acid Average molarity (show calculations) Standard deviation QUESTIONS 1. What are the largest sources of error in this experiment? 2. What is the pH of the solution obtained by mixing 30.00 mL of 0.250 M HCl and...
Experiment VII: Buffers Lab Report ( 49 pts) I. Determination of the K, of acetic acid...
Experiment VII: Buffers Lab Report ( 49 pts) I. Determination of the K, of acetic acid 1. Measured pH of the solution PH 2.40 < Calculate the [H3O*) at equilibrium for this solution. (include units) Tog [HT] = 10-2.40 H 0% 0.004 m. 3. Calculate the [CH,C00] at equilibrium for this solution. (include units) [CH.CO01 0.004 m 4. What is the [CH3COOH) at equilibrium for this solution? (include units) 700. [CH.COOH): 0.00lem 5. Based on these values, what the acid...
10. Determine the hydroxide ion concentration and pH of 0.0942 M hypochlorous acid solu- tion. K...
10. Determine the hydroxide ion concentration and pH of 0.0942 M hypochlorous acid solu- tion. K = 2.85 x 10 Answer 11. What is the pH of 20.00 mL 0.100 M acetic acid solution that is mixed with 30.00 mL 0.200 M sodium acetate solution? K = 1.8 x 10% Answer 12. Determine the fluoride ion concentration for a saturated solution of magnesium fluoride. K = 7.4 x 10 Answer
A student must make a buffer solution with a pH of 1.00. Determine which weak acid...
A student must make a buffer solution with a pH of 1.00. Determine which weak acid is the best option to make a buffer at the specified pH. O propionic acid, K =1.34 x 10 5,3.00 M acetic acid, Ka = 1.75 x 10,5.00 M O formic acid, Kg = 1.77 x 104,2.00 M sodium bisulfate monohydrate, K = 1.20 x 102,3.00 M Determine which conjugate base is the best option to make a buffer at the specified pH. sodium...
Question 22 (1 point) The K, of hypochlorous acid (HCIO) is 3.0 * 10-at 25.0 "C....
Question 22 (1 point) The K, of hypochlorous acid (HCIO) is 3.0 * 10-at 25.0 "C. Calculate the pH of a 0.0385 M hypochlorous acid solution (pH of a weak acid - with approximation, [H,0") Sort (K, Cal; where CHA is weak acid concentration) A) 9.53 B) 3.05 C) 6.52 D-3.05 E) 4.47 Question 23 (1 point) A particular first-order reaction has a rate constant of 1.35 "C. What is the magnitude of kat 75.0 "CIT 105 at 25.0 (Use...
Solutions available 1.Acetic acid (CHCOH, K = 1.8 10) and sodium acetate (NaCHO). 2.Ammonium chloride (NHCl,...
Solutions available 1.Acetic acid (CHCOH, K = 1.8 10) and sodium acetate (NaCHO). 2.Ammonium chloride (NHCl, K for NH = 5.6 10) and ammonia (NH). (The buffer will be prepared by choosing the appropriate acid-base pair, calculating the molar ratio of acid to base that will produce the assigned pH, and then mixing the calculated amounts of the two compounds with enough deionized water to make 200. mL of buffer solution. A solution with approximately the same pH as...
1. e d weak acid that undergo A 0.0010 M HCl solution has an indicat following...
1. e d weak acid that undergo A 0.0010 M HCl solution has an indicat following hydrolysis (with pk. - 3.01) Hin + HO HO Bin If Hin is red and In- is green, what color will the solution be a. a mixture of red and green (ie yellow) b. red c. none of the other answers d. green 2. Sodium hydroxide reacts with acetic acid to produce sodium acetate and water. It takes 25.0 ml of 0.40 M NaOH...
Determine K, for the unknown acid. 4. What is the pH of the solution that results when 25.0 mL of 0.125 M NaOH is added to 25.0 mL of 0.250 M на? 5. What is the pH of a solution that is 0.40 M in sodium acetate and 0.60 M on acetic acid? (K, for acetic acid is 1.85 x 10%
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...
6) At 25 C, the K, for formic acid (HCO2H) is 1.8 x 10-4. What is the pH of a 0.10 M aqueous solution of lithium formate (LiHCO2)? 7) What is the pH (aq., 25 °C) of this solution: adding 1.64 grams of sodium acetate to give 200.0 ml solution at 25.0°C? The K, at 25.0°C for acetic acid is 1.8 x 10-5.
0 Mava=mV6 XvP Soma = Moub - Vaan. Determination of the castante Weak Acid D. Concentration of Unknown Acid Trial 3 - Trial Trial Volume of unknown acid Average molarity of NaOH from above mL of NaOH at equivalence point Molarity of unknown acid Average molarity (show calculations) Standard deviation QUESTIONS 1. What are the largest sources of error in this experiment? 2. What is the pH of the solution obtained by mixing 30.00 mL of 0.250 M HCl and...
Experiment VII: Buffers Lab Report ( 49 pts) I. Determination of the K, of acetic acid 1. Measured pH of the solution PH 2.40 < Calculate the [H3O*) at equilibrium for this solution. (include units) Tog [HT] = 10-2.40 H 0% 0.004 m. 3. Calculate the [CH,C00] at equilibrium for this solution. (include units) [CH.CO01 0.004 m 4. What is the [CH3COOH) at equilibrium for this solution? (include units) 700. [CH.COOH): 0.00lem 5. Based on these values, what the acid...
10. Determine the hydroxide ion concentration and pH of 0.0942 M hypochlorous acid solu- tion. K = 2.85 x 10 Answer 11. What is the pH of 20.00 mL 0.100 M acetic acid solution that is mixed with 30.00 mL 0.200 M sodium acetate solution? K = 1.8 x 10% Answer 12. Determine the fluoride ion concentration for a saturated solution of magnesium fluoride. K = 7.4 x 10 Answer
A student must make a buffer solution with a pH of 1.00. Determine which weak acid is the best option to make a buffer at the specified pH. O propionic acid, K =1.34 x 10 5,3.00 M acetic acid, Ka = 1.75 x 10,5.00 M O formic acid, Kg = 1.77 x 104,2.00 M sodium bisulfate monohydrate, K = 1.20 x 102,3.00 M Determine which conjugate base is the best option to make a buffer at the specified pH. sodium...
Question 22 (1 point) The K, of hypochlorous acid (HCIO) is 3.0 * 10-at 25.0 "C. Calculate the pH of a 0.0385 M hypochlorous acid solution (pH of a weak acid - with approximation, [H,0") Sort (K, Cal; where CHA is weak acid concentration) A) 9.53 B) 3.05 C) 6.52 D-3.05 E) 4.47 Question 23 (1 point) A particular first-order reaction has a rate constant of 1.35 "C. What is the magnitude of kat 75.0 "CIT 105 at 25.0 (Use...
1. e d weak acid that undergo A 0.0010 M HCl solution has an indicat following hydrolysis (with pk. - 3.01) Hin + HO HO Bin If Hin is red and In- is green, what color will the solution be a. a mixture of red and green (ie yellow) b. red c. none of the other answers d. green 2. Sodium hydroxide reacts with acetic acid to produce sodium acetate and water. It takes 25.0 ml of 0.40 M NaOH...
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