Homework Answers
Answer:-
These questions are answered by using simple concept of ionisation of weak acid and expression of Ka and Kb .
The answer is given in the image,
![Answert Z HC g H₂04 (+420 1 0.10M 4306, + Cg H20 G, C -x px + 010- =10-2.27 - PH= 2.27, [hot] = [Cg H₂ 047 = 10-ph Ka= [Hot]](http://img.homeworklib.com/questions/f6deaf00-6f59-11ea-b33b-4186e40c19ed.png?x-oss-process=image/resize,w_560)
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in (acetylsalicyclic acid HCH,04) is a weak acid. It ionizes in water according to the following...
do not know where to start on part c and d 11. Propanoic acid, HC3H,O2, ionizes...
do
not know where to start on part c and d
11. Propanoic acid, HC3H,O2, ionizes in water according to the equation below K-1.34 X 10 + H3O HCH,O HO CsHsO2( a Write the equilibrium constant expression for the reaction. CHCgHO2 b. Calculate the pH of a 0.265M solution of propanoic acid. 2 Cafleo HO HC,H02H,0 I 0,265M 2 1.34 x (0 L0,265 OM OM dre 2.05x10 tx X 4 0,265-x Aog [.8x 10-M 34x 10-5 X 0,205 veglig 0.00188M-X=[H,0...
3. Show how acetic acid, CH3COOH, ionizes in solution and calculate the pH of a 0.30...
3. Show how acetic acid, CH3COOH, ionizes in solution and calculate the pH of a 0.30 M solution of the acid. Ką for acetic acid = 1.8 x 10-5. 4. Show how aniline, CH5NH2, ionizes in solution and calculate the pH of a 0.25 M solution of the compound. Kb = 3.8 x 10-10
3. Consider the following weak acids and their K, values, calculate the pK, for each acid....
3. Consider the following weak acids and their K, values, calculate the pK, for each acid. HC,H,O, - Acetic acid K. = 1.8 x 105 PK,= H,PO, - Phosphoric acid K = 7.1 x 10 PK, HCIO - Hypochlorous acid K = 3.5 x 10 pk = You want to prepare buffers at pH 2.8, 4.5 and 7.5. Which weak acid-conjugate base buffer system is the best choice for each pH from the acids listed? Write the reaction and indicate...
d 5.11 e. 8.38 12. Butanoic acid (HCH-Os) is a weak acid that hydrolyzes in water...
d 5.11 e. 8.38 12. Butanoic acid (HCH-Os) is a weak acid that hydrolyzes in water according to HC HẠO, + HẠO -> CHO + HNO If the salt KCHO, is added to the solution, the [OH') while the pH a. decreases, decreases b. decreases, increases c. increases increases d. increase, decreases 13. A sample is 0.0010 M in Mg and 0.0010 M in Pb Co,-ions are slowly added to the solution, what will be the concentration of Pb when...
W THE PENCERO .99 37. Consider the reaction of acetic acid in water CH3CO2H(aq)+H2O(l) = CH3CO2...
W THE PENCERO .99 37. Consider the reaction of acetic acid in water CH3CO2H(aq)+H2O(l) = CH3CO2 (aq)+H30 (aq) where K=1.8x10-5 Which two bases are competing for the proton? Which is the stronger base? Why do we classify the acetate ion (CH3CO2) as a weak base? Use an appropriate reaction to justify your answer. 38. To summarize, the conjugate base of a weak acid is a weak base and the conjugate acid of a weak base is a weak acid (weak...
59. Based on the information found in Table 16.2 with respect to K, which statement is...
59. Based on the information found in Table 16.2 with respect to K, which statement is true? Page 12 TABLE 16.2 Some Weak Acids in Water at 25°C Structural Conjugate Acid Formula Equilibrium Reaction K Hydrofluoric (HF) HF + HO HO + F 68 x 10-4 Nitrous HO-NO NO, HNO (M) + H200 H304) + NO:) 5 x 10+ CHNO) Benzo GH.0, HCH. + H.-H,0) + CH.063 X 10 CHCH,0) Acetic H-0----HC,H,O, HCH,000+ HODH,00) + CH,0) 18 109 CHCH.O.) Hypochlorus...
4. A solution is made by dissolving 15.00 grams of acetic acid and 3.25 grams of...
4. A solution is made by dissolving 15.00 grams of acetic acid and 3.25 grams of sodium acetate in 500.00 mL of water. What is the pH of the solution? The K, of acetic acid is 1.8 x 10. (Hints: First convert grams to mol and then determine the molarity of acetic acid and sodium acetate, ...) 5. What is the pH of a 2.50 molar solution of NHCl(aq)? The Ko for NH, is 1.8 x 105. 6. A certain...
Consider the following data on some weak acids and weak bases: acid Ka name formula HCH,CO2...
Consider the following data on some weak acids and weak bases: acid Ka name formula HCH,CO2 1.8 x 10-5 base name formula pyridine C;HEN 1.7x10-9 ethylamine C2H5NH2 6.4 x 10-4 acetic acid hypochlorous acid HClO 3.0 x 108 Use this data to rank the following solutions in order of increasing pH. In other words, select a 'l' next to the solution that will have the lowest pH, a '2' next to the solution that will have the next lowest pH,...
a) b) c) d) If the Kb of a weak acid is 2.9 10*, the K,...
a)
b)
c)
d)
If the Kb of a weak acid is 2.9 10*, the K, of its conjugate acid must be which of the following? 2.9.10 6.46 7.54 3.4 10- The hydronium ion concentration of a 0.50 mol/L solution of hydrocyanic acid, HCN(aq), is 1.4 x 10-5 mol/L. Use Weak Acid Info 16.1 to answer the following question. The Ka for hydrocyanic acid is: 3.9 x 10-10 1.4 x 10-5 5.0 x 10-2 6.2 x 10-10 An acetic acid-sodium...
An analytical chemist is titrating 69.7 mL of a 0.3900 M solution of acetic acid (HCH,...
An analytical chemist is titrating 69.7 mL of a 0.3900 M solution of acetic acid (HCH, CO,) with a 1.200 M solution of NaOH. The pK, of acetic acid is 4.70. Calculate the pH of the acid solution after the chemist has added 10.6 mL of the NaOH solution to it. Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of NaOH solution added. Round your answer to 2...
do
not know where to start on part c and d
11. Propanoic acid, HC3H,O2, ionizes in water according to the equation below K-1.34 X 10 + H3O HCH,O HO CsHsO2( a Write the equilibrium constant expression for the reaction. CHCgHO2 b. Calculate the pH of a 0.265M solution of propanoic acid. 2 Cafleo HO HC,H02H,0 I 0,265M 2 1.34 x (0 L0,265 OM OM dre 2.05x10 tx X 4 0,265-x Aog [.8x 10-M 34x 10-5 X 0,205 veglig 0.00188M-X=[H,0...
3. Show how acetic acid, CH3COOH, ionizes in solution and calculate the pH of a 0.30 M solution of the acid. Ką for acetic acid = 1.8 x 10-5. 4. Show how aniline, CH5NH2, ionizes in solution and calculate the pH of a 0.25 M solution of the compound. Kb = 3.8 x 10-10
3. Consider the following weak acids and their K, values, calculate the pK, for each acid. HC,H,O, - Acetic acid K. = 1.8 x 105 PK,= H,PO, - Phosphoric acid K = 7.1 x 10 PK, HCIO - Hypochlorous acid K = 3.5 x 10 pk = You want to prepare buffers at pH 2.8, 4.5 and 7.5. Which weak acid-conjugate base buffer system is the best choice for each pH from the acids listed? Write the reaction and indicate...
d 5.11 e. 8.38 12. Butanoic acid (HCH-Os) is a weak acid that hydrolyzes in water according to HC HẠO, + HẠO -> CHO + HNO If the salt KCHO, is added to the solution, the [OH') while the pH a. decreases, decreases b. decreases, increases c. increases increases d. increase, decreases 13. A sample is 0.0010 M in Mg and 0.0010 M in Pb Co,-ions are slowly added to the solution, what will be the concentration of Pb when...
W THE PENCERO .99 37. Consider the reaction of acetic acid in water CH3CO2H(aq)+H2O(l) = CH3CO2 (aq)+H30 (aq) where K=1.8x10-5 Which two bases are competing for the proton? Which is the stronger base? Why do we classify the acetate ion (CH3CO2) as a weak base? Use an appropriate reaction to justify your answer. 38. To summarize, the conjugate base of a weak acid is a weak base and the conjugate acid of a weak base is a weak acid (weak...
59. Based on the information found in Table 16.2 with respect to K, which statement is true? Page 12 TABLE 16.2 Some Weak Acids in Water at 25°C Structural Conjugate Acid Formula Equilibrium Reaction K Hydrofluoric (HF) HF + HO HO + F 68 x 10-4 Nitrous HO-NO NO, HNO (M) + H200 H304) + NO:) 5 x 10+ CHNO) Benzo GH.0, HCH. + H.-H,0) + CH.063 X 10 CHCH,0) Acetic H-0----HC,H,O, HCH,000+ HODH,00) + CH,0) 18 109 CHCH.O.) Hypochlorus...
4. A solution is made by dissolving 15.00 grams of acetic acid and 3.25 grams of sodium acetate in 500.00 mL of water. What is the pH of the solution? The K, of acetic acid is 1.8 x 10. (Hints: First convert grams to mol and then determine the molarity of acetic acid and sodium acetate, ...) 5. What is the pH of a 2.50 molar solution of NHCl(aq)? The Ko for NH, is 1.8 x 105. 6. A certain...
Consider the following data on some weak acids and weak bases: acid Ka name formula HCH,CO2 1.8 x 10-5 base name formula pyridine C;HEN 1.7x10-9 ethylamine C2H5NH2 6.4 x 10-4 acetic acid hypochlorous acid HClO 3.0 x 108 Use this data to rank the following solutions in order of increasing pH. In other words, select a 'l' next to the solution that will have the lowest pH, a '2' next to the solution that will have the next lowest pH,...
a)
b)
c)
d)
If the Kb of a weak acid is 2.9 10*, the K, of its conjugate acid must be which of the following? 2.9.10 6.46 7.54 3.4 10- The hydronium ion concentration of a 0.50 mol/L solution of hydrocyanic acid, HCN(aq), is 1.4 x 10-5 mol/L. Use Weak Acid Info 16.1 to answer the following question. The Ka for hydrocyanic acid is: 3.9 x 10-10 1.4 x 10-5 5.0 x 10-2 6.2 x 10-10 An acetic acid-sodium...
An analytical chemist is titrating 69.7 mL of a 0.3900 M solution of acetic acid (HCH, CO,) with a 1.200 M solution of NaOH. The pK, of acetic acid is 4.70. Calculate the pH of the acid solution after the chemist has added 10.6 mL of the NaOH solution to it. Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of NaOH solution added. Round your answer to 2...
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