Homework Answers
Correct option: d
If a strong base is added to the buffer then the acidic component of the buffer reacts with it to form the conjugate base and water. Thus, acetic acid will react with NaOH to form acetate and water.
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Buffer action 4 A buffer solution consisting of 0.05 mol/L acetic acid (CH3COOH) and 0.05 mol/L...
3. One liter of buffer solution was prepared by mixing 0.1 mole of acetic acid CH3COOH...
3. One liter of buffer solution was prepared by mixing 0.1 mole of acetic acid CH3COOH and 0.05 mole of sodium acetate CH3COONa. Calculate a. pH of that solution b. How much of a strong base, say NaOH, in mol/L needs to be added to that solution to change its pH to 6.0? Notes and useful data: For acetic acid pK4.75 For carbonic acid pKa 6.3 and pKa 10.3 Sodium acetate CH3COONa dissociates entirely to Na'CH3COO
A buffer solution contains 0.05 mol of acetic acid and 0.065 mol of sodium acetate in...
A buffer solution contains 0.05 mol of acetic acid and 0.065 mol of sodium acetate in 1.00-L. What is the pH of the buffer after the addition of 0.01 mol of HNO3? Ka(acetic acid) = 1.8 x 10^-5 Thank you!
In your pre-lab, we asked you to consider a few of the properties you could measure...
In your pre-lab, we asked you to consider a few of the properties you could measure during the titration of a 100.0 mL sample of 1.0 M acetic acid, CH3COOH (Ka = 1.8 x 10-5) with 0.50 mol/L NaOH solution at 25°C. Let's think about this same titration again, this time at the molecular-scale. Question 2 (1 point) After you have added a total of 100.0 mL of NaOH (aq), what are the major species in your beaker other than...
1) Calculate the pH of the 1L buffer composed of 500 mL of 0.60 M acetic...
1) Calculate the pH of the 1L buffer composed of 500 mL of 0.60 M acetic acid plus 500 mL of 0.60 M sodium acetate, after 0.010 mol of HCl is added (Ka HC2H3O2 = 1.75 x 10-5). Report your answer to the hundredths place. 2) Calculate the pH of the 1L buffer composed of 500 mL 0.60 M acetic acid plus 500 mL of 0.60 M sodium acetate, after 0.010 mol of NaOH is added (Ka HC2H3O2 = 1.75...
A 1.00 L buffer solution with pH = 4.74 is composed of 0.30 mol acetic acid...
A 1.00 L buffer solution with pH = 4.74 is composed of 0.30 mol acetic acid and 0.30 mol sodium acetate. A) Determine the pKa of acetic acid B) If 0.030 mol of NaOH is added, determine the pH of the solution
Suppose a buffer solution is made from formic acid, HCHO2, and sodium formate, NaCHO2. What is...
Suppose a buffer solution is made from formic acid, HCHO2, and sodium formate, NaCHO2. What is the net ionic equation for the reaction that occurs when a small amount of sodium hydroxide is added to the buffer? Select one: a. H3O+(aq) + OH–(aq) → 2H2O(l) b. OH–(aq) + HCHO2(aq) → CHO2–(aq) + H2O(l) c. NaOH(aq) + H3O+(aq) → Na+(aq) + 2H2O(l) d. NaOH(aq) + HCHO2(aq) → NaCHO2(aq) + H2O(l)
As hydrogen ions, H+ are added to an acidic buffer solution made of acetic acid (...
As hydrogen ions, H+ are added to an acidic buffer solution made of acetic acid ( CH3COOH ) and sodium acetate, what happens to [CH3COOH ] and [ CH3COO¯ ] (conjugate base)? A. Both [CH3COOH ] and [ CH3COO¯ ] increase B. Both [CH3COOH ] and [ CH3COO¯ ] decrease C. [CH3COOH ] increases but [ CH3COO¯ ] decreases D. [CH3COOH ] decreases but [ CH3COO¯ ] increases
Question 1 1 pts Consider a solution that is 0.1 M HF and 0.1 M NaF....
Question 1 1 pts Consider a solution that is 0.1 M HF and 0.1 M NaF. This is a mixture of conjugates in equal proportions, which tells you that it is a buffer. What two reactions are relevant to the pH in this situation? NaF --> Nat + F F+H2O <--> HF + OH- HF + NaF --> H+ +Na+ + F2 HF <--> H+ +F Ht+F<--> Nat + F" Question 2 1 pts A buffer solution contains a mixture...
1.A 1.00 liter solution contains 0.28 M acetic acid and 0.36 M sodium acetate. If 0.180...
1.A 1.00 liter solution contains 0.28 M acetic acid and 0.36 M sodium acetate. If 0.180 moles of potassium hydroxide are added to this system, indicate whether the following statements are true or false. (Assume that the volume does not change upon the addition of potassium hydroxide.) A. The number of moles of CH3COOH will remain the same. B. The number of moles of CH3COO- will decrease. C. The equilibrium concentration of H3O+ will increase. D. The pH will increase....
A buffer formed from 20.0 mL of 0.120 M Acetic acid (CH3COOH) (pKa = 4.74) and...
A buffer formed from 20.0 mL of 0.120 M Acetic acid (CH3COOH) (pKa = 4.74) and 12.0 mL of 0.200 M sodium acetate (CH3COONa). What is the pH of this buffer after addition of 0.0001 mol of HCl?
3. One liter of buffer solution was prepared by mixing 0.1 mole of acetic acid CH3COOH and 0.05 mole of sodium acetate CH3COONa. Calculate a. pH of that solution b. How much of a strong base, say NaOH, in mol/L needs to be added to that solution to change its pH to 6.0? Notes and useful data: For acetic acid pK4.75 For carbonic acid pKa 6.3 and pKa 10.3 Sodium acetate CH3COONa dissociates entirely to Na'CH3COO
In your pre-lab, we asked you to consider a few of the properties you could measure during the titration of a 100.0 mL sample of 1.0 M acetic acid, CH3COOH (Ka = 1.8 x 10-5) with 0.50 mol/L NaOH solution at 25°C. Let's think about this same titration again, this time at the molecular-scale. Question 2 (1 point) After you have added a total of 100.0 mL of NaOH (aq), what are the major species in your beaker other than...
Question 1 1 pts Consider a solution that is 0.1 M HF and 0.1 M NaF. This is a mixture of conjugates in equal proportions, which tells you that it is a buffer. What two reactions are relevant to the pH in this situation? NaF --> Nat + F F+H2O <--> HF + OH- HF + NaF --> H+ +Na+ + F2 HF <--> H+ +F Ht+F<--> Nat + F" Question 2 1 pts A buffer solution contains a mixture...
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