Multiple Choice
Which component of the acetic acid buffer pair would react with added NaOH?
18. Aqueous Equilibrium
Intro to Buffers
Back18. Aqueous Equilibrium
Intro to Buffers
- Multiple ChoiceA buffer solution is prepared by adding 9.04 mL of 1.27 M HBr to 190.0 mL of 0.11 M methylamine solution. The buffer is allowed time to establish. Then, 0.005 mol of a strong base is added. What is the pH of the resulting solution? Round your answer to 2 decimal places.
- Multiple ChoiceWhich component of the acetic acid buffer pair would react with added HCl?
- Multiple ChoiceSuppose you are performing an experiment that requires a constant pH of 4.75. Which of the following buffer systems would be most appropriate based on the given Ka values?
- Multiple ChoiceCalculate the pH value for a buffer solution prepared by adding 1.0 mL of a 0.10M acetic acid solution to 20 mL of a 0.10M sodium acetate solution. (Ka = 1.7 × 10⁻⁵)
- Open QuestionWhich of the following solutions is a good buffer system?2views
- Multiple ChoiceWhat mass of NaC2H3O2 (molar mass = 82.03 g/mol) would need to be added to 0.450 moles of HC2H3O2 to prepare a 1.0 L buffer with a pH = 4.95. Ka for HC2H3O2 = 1.8 × 10−5.2views
- Multiple Choice
Calculate the pH of a solution formed by mixing 200 mL of a 0.400 M C2H5NH2 solution with 350 mL of a 0.450 M C2H5NH3+ solution. (Kb of C2H5NH2 is 5.6 x 10 -4).
3views - Open Question
A buffer resists change in ph when ___________ amount of acid or base is added to it.
1views - Open Question
Select the statement that best describes a buffer. see concept 3.3 (page)
2views - Multiple ChoiceA 1.00 L buffer solution is 0.250 M in HF and 0.250 M in NaF. Calculate the pH of the solution after the addition of 100.0 mL of 1.00 M HCl. The Ka for HF is 3.5 × 10⁻⁴.
- Multiple ChoiceA benzoate buffer is prepared containing 0.33 M benzoic acid and 0.28 M benzoate. The Ka of benzoic acid is 6.3 x 10^-5. What is the pH of the buffer after the addition of 20 mL of 0.50 M NaOH to 100 mL of this buffer?
- Multiple Choice
Determine how many grams of sodium acetate, NaCH3CO2 (MW:82.05 g/mol), you would mix into enough 0.065 M acetic acid CH3CO2H (MW:60.05 g/mol) to prepare 3.2 L of a buffer with a pH of 4.58. The Ka is 1.8 x 10-5.
2views - Multiple Choice
Determine which of the following actions will destroy a buffer composed of 0.50 L of 1.44 M H3PO4 and 0.60 L of 1.25 M NaH2PO4−.
a) Addition of 1.45 moles of KH2PO4
b) Addition of 0.85 moles of HCl
c) Addition of water
d) Addition of 0.30 moles of Ca(OH)2
e) Addition of 0.70 moles of HIO4
3views - Multiple ChoiceWhich of the following statements is true about a solution prepared with equal amounts of HNO2 and NaNO2?2views