Homework Answers
pKa = - Log 10Ka
pKb = - Log 10Kb
![#22 Complete the following table. [3/box] and Compound Кa pКa Kb pkb Carbonic acid 37 2.3x 10 6.25 x 105 11 5*10A-4 4.3 x 107](http://img.homeworklib.com/questions/de901be0-70b4-11ea-896a-fd6c4d086635.png?x-oss-process=image/resize,w_560)
![#24 Which conjugate acid/base pair in the table above would you use to prepare the TOIIOWIng watrersT [6] sodium acetate I wo](http://img.homeworklib.com/questions/df56b440-70b4-11ea-b4c5-75a1e051ddb5.png?x-oss-process=image/resize,w_560)
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hello, looking for guidance. needing help with completing the
chart (#22) and finishing the following questions:...
Using the K values in the table below, calculate the pH of a buffer that contains...
Using the K values in the table below, calculate the pH of a buffer that contains the given concentrations of a weak acid and its conjugate base. 0.72 M Na HPO and 0.38 M Na PO pH Table 9.6 Common Buffers Buffer Weak Acid Conjugate Base к, Acetic acid/acetate CH-соон сн,соо" 1.8 x 10-5 Bicarbonate/carbonate HCO, co 5.6 x 10-11 Dihydrogen phosphate/ hydrogen phosphate H.PO HPO 6.2 x 10 Hydrogen phosphate/ phosphate HPO PO 2.2x 10-13
please help! will rate all. solutions of the following compounds in your lab. HA (K =...
please help! will rate all.
solutions of the following compounds in your lab. HA (K = 1.2 x 10) NaA HB (K = 2.6 x 10-) NaB HC (K = 9.2 x 10) NaC Identify the conjugate acid-base pair that is most appropriate for making a buffer with pH = 7.40. Then, calculate the volume of each component required to make 5.0 L of the buffer. b. Identify the conjugate acid-base pair that is most appropriate for making a buffer...
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...
I need help with questions 4 to 7. I have solved 1 to 3 as reference....
I need help with questions 4 to 7. I have solved 1 to 3 as
reference. Thank you.
10:COMPARISON OF BUFFERED AND UNBUFFERED SYSTEMS To Sindents: This labit hranih alat date wahisand calculations of buffers and pH, there is no date. Your instructor will assign a specific buffer for or instructor will assign a specific buffer for you to make in the lab. "You will then be asked to perform serveral calculations based on your migue buffer assignment. way bandurite...
Buffers 1. Indicate which of the following pairs of compounds could be used to make a buffer solution by placing an X i...
Buffers 1. Indicate which of the following pairs of compounds could be used to make a buffer solution by placing an X in the appropriate column. Buffer Solution | Not a Buffer Solution Pair of Compounds HF and Cl H.COs and OH HNO2 and NO NHa and NH L 2. Write out the reaction of acetic acid CH.COOH reacting with water. 3. What is the pH of a buffer solution in which the (CH3COOH) is 0.229 M and the (CH...
please help The following table, used for question 16, is partially complete: (ОН) pH 2.68 pОН...
please help
The following table, used for question 16, is partially complete: (ОН) pH 2.68 pОН ener 8.4 x 10 euen 16. (3 points) Fill in the six empty cells in the table. The following table, used for questions 2-8, is partially complete: Ka 1.8 x 10 pka Conj. Base formula pKb Acid Formula CH3COOH HOBI HNO2 5.40 3.14 2.2 x 10 Sec 17. (6 points) Fill in the twelve empty cells of the table above. 18. What is the...
Post-Lab Assignment: pH and Buffers 1. A buffer is prepared from a weak acid with a...
Post-Lab Assignment: pH and Buffers 1. A buffer is prepared from a weak acid with a Ka - 7.1 x 104 and its conjugate base. a. What pH would provide maximum buffer capacity? b. What would be the buffer range for this acid? (Your answer should show the lowest and the highest pH that would provide a reasonably effective buffer.) 2. If you were provided with a 0.1 M solution of an unknown weak acid and a 0.1 M solution...
I am needing help to solve this table. specifically the step 4 portion. My 2 compounds...
I am needing help to solve this table. specifically the step 4
portion. My 2 compounds that I'm using for this experiment are 0.1
M NaHCO3 (acid) and 0.1 M Na2CO3. im having issues finding the
concentration and pKa of everything.
thank you!
Step 1 hydrogen carbonate/carbonate (HCO3/003-) [NaHCO₃ and Nagco ₂] Initial Buffer: Pour 10 mL of the acid component of your buffer into a 50-ml beaker. Add 10 mL of the conjugate base of your buffer, and mix....
Out of the following , which is the best acid/base to use to prepare a buffer...
Out of the following , which is the best acid/base to use to prepare a buffer with a PH of 4.00? a. sodium chloride b. sodium pyruvate c. aniline What ratio of masses of the weak acid/base and its conjugate should you use to make the buffer of the required PH? Use the sodium salt of the conjugate base if you chose a weak acid or the chloride salt of the conjugate acid if you chose a weak base.
In our experiment, we will be using a portion of the phosphate buffer system that is...
In our experiment, we will be using a portion of the phosphate buffer system that is based upon the following equilibrium: H2PO4- HPO42- + H+ pKa = 7.2 In this case, H2PO4- will act as the acid and HPO42- will act as the base. Materials: 1M NaOH: 40.01 g/L of solution 1M HCl: 83 mL conc. HCl/L of solution Potassium phosphate, dibasic, K2HPO4, MW= 174.18 Potassium phosphate, monobasic, KH2PO4 MW= 136.09 **I already preformed this lab, but I struggled a...
Using the K values in the table below, calculate the pH of a buffer that contains the given concentrations of a weak acid and its conjugate base. 0.72 M Na HPO and 0.38 M Na PO pH Table 9.6 Common Buffers Buffer Weak Acid Conjugate Base к, Acetic acid/acetate CH-соон сн,соо" 1.8 x 10-5 Bicarbonate/carbonate HCO, co 5.6 x 10-11 Dihydrogen phosphate/ hydrogen phosphate H.PO HPO 6.2 x 10 Hydrogen phosphate/ phosphate HPO PO 2.2x 10-13
please help! will rate all.
solutions of the following compounds in your lab. HA (K = 1.2 x 10) NaA HB (K = 2.6 x 10-) NaB HC (K = 9.2 x 10) NaC Identify the conjugate acid-base pair that is most appropriate for making a buffer with pH = 7.40. Then, calculate the volume of each component required to make 5.0 L of the buffer. b. Identify the conjugate acid-base pair that is most appropriate for making a buffer...
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...
I need help with questions 4 to 7. I have solved 1 to 3 as
reference. Thank you.
10:COMPARISON OF BUFFERED AND UNBUFFERED SYSTEMS To Sindents: This labit hranih alat date wahisand calculations of buffers and pH, there is no date. Your instructor will assign a specific buffer for or instructor will assign a specific buffer for you to make in the lab. "You will then be asked to perform serveral calculations based on your migue buffer assignment. way bandurite...
Buffers 1. Indicate which of the following pairs of compounds could be used to make a buffer solution by placing an X in the appropriate column. Buffer Solution | Not a Buffer Solution Pair of Compounds HF and Cl H.COs and OH HNO2 and NO NHa and NH L 2. Write out the reaction of acetic acid CH.COOH reacting with water. 3. What is the pH of a buffer solution in which the (CH3COOH) is 0.229 M and the (CH...
please help
The following table, used for question 16, is partially complete: (ОН) pH 2.68 pОН ener 8.4 x 10 euen 16. (3 points) Fill in the six empty cells in the table. The following table, used for questions 2-8, is partially complete: Ka 1.8 x 10 pka Conj. Base formula pKb Acid Formula CH3COOH HOBI HNO2 5.40 3.14 2.2 x 10 Sec 17. (6 points) Fill in the twelve empty cells of the table above. 18. What is the...
Post-Lab Assignment: pH and Buffers 1. A buffer is prepared from a weak acid with a Ka - 7.1 x 104 and its conjugate base. a. What pH would provide maximum buffer capacity? b. What would be the buffer range for this acid? (Your answer should show the lowest and the highest pH that would provide a reasonably effective buffer.) 2. If you were provided with a 0.1 M solution of an unknown weak acid and a 0.1 M solution...
I am needing help to solve this table. specifically the step 4
portion. My 2 compounds that I'm using for this experiment are 0.1
M NaHCO3 (acid) and 0.1 M Na2CO3. im having issues finding the
concentration and pKa of everything.
thank you!
Step 1 hydrogen carbonate/carbonate (HCO3/003-) [NaHCO₃ and Nagco ₂] Initial Buffer: Pour 10 mL of the acid component of your buffer into a 50-ml beaker. Add 10 mL of the conjugate base of your buffer, and mix....
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