Buffer Solutions
Chemistry ⇒ Acids, Bases, and Salts
Buffer Solutions starts at 11 and continues till grade 12.
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A buffer solution is prepared by mixing 0.1 mol of NH₄Cl and 0.1 mol of NH₄OH in 1 L of water. What type of buffer is this?
Describe the composition of a buffer solution that maintains a pH close to 9.
Describe the role of buffer solutions in biological systems.
Explain the term 'buffer range'.
Explain why a buffer solution is not effective beyond its buffer range.
Explain why a buffer solution is not effective when the concentration of acid or base is very low.
Explain why a mixture of HCl and NaCl does not form a buffer solution.
Explain why the buffer capacity is higher when the concentrations of acid and its salt are high.
Which of the following is a buffer solution? (1) 0.1 M HCl + 0.1 M NaCl (2) 0.1 M CH₃COOH + 0.1 M CH₃COONa (3) 0.1 M NaOH + 0.1 M NaCl (4) 0.1 M HNO₃ + 0.1 M KNO₃
Which of the following is a limitation of buffer solutions? (1) They can only be used at high temperatures. (2) They have a limited capacity to neutralize acids or bases. (3) They are always basic. (4) They cannot be used in laboratories.
Which of the following is a property of a buffer solution? (1) It has a constant pH regardless of dilution. (2) It resists changes in pH upon addition of small amounts of acid or base. (3) It is always basic. (4) It contains only strong acids and bases.
Which of the following is an example of an acidic buffer? (1) NH₄OH + NH₄Cl (2) CH₃COOH + CH₃COONa (3) NaOH + NaCl (4) HCl + NaCl
A buffer solution is most effective when the concentration of acid and its conjugate base are ________.
Fill in the blank: The capacity of a buffer depends on the ________ of the acid and its conjugate base.
Fill in the blank: The effectiveness of a buffer is maximum when the pH is equal to the ________ of the acid.
Fill in the blank: The pH of a buffer solution depends on the pKa of the acid and the ________ of salt to acid.
True or False: A buffer solution can be made by mixing a weak base with its salt formed with a strong acid.
True or False: A buffer solution can be prepared by mixing a strong acid with its salt.
True or False: Buffer solutions can be used to calibrate pH meters.
True or False: The addition of a large amount of strong acid to a buffer will eventually overcome its buffering capacity.
