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 made by mixing 0.1 M HCOOH and 0.1 M HCOONa. What will happen to the pH if a small amount of HCl is added?
Define a buffer solution and give one example.
Describe how you would prepare 1 L of a buffer solution with pH 4.76 using acetic acid and sodium acetate.
Describe the composition of a buffer solution that can maintain a pH close to 5.
A buffer solution contains 0.3 M NH₄OH and 0.2 M NH₄Cl. Calculate the pH if K_b for NH₄OH is 1.8 × 10⁻⁵.
A buffer solution contains 0.4 M formic acid (HCOOH, pKₐ = 3.75) and 0.2 M sodium formate. Calculate the pH.
A buffer solution is made by mixing 0.1 M HCOOH and 0.1 M HCOONa. What will happen to the pH if a small amount of HCl is added?
A buffer solution is made by mixing 0.5 M acetic acid and 0.5 M sodium acetate. What is the pH if pKₐ = 4.76?
Which of the following is a basic buffer? (1) CH₃COOH + CH₃COONa (2) NH₄OH + NH₄Cl (3) H₂CO₃ + NaHCO₃ (4) HCl + NaCl
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 NH₄Cl + 0.1 M NaCl
Which of the following is a buffer system in human blood? (1) H₂CO₃/HCO₃⁻ (2) HCl/Cl⁻ (3) NaOH/NaCl (4) HNO₃/NO₃⁻
Which of the following is NOT a buffer solution? (1) H₂CO₃ + NaHCO₃ (2) HCl + NaCl (3) CH₃COOH + CH₃COONa (4) NH₄OH + NH₄Cl
A buffer solution is most effective when the concentration of acid and its conjugate base are ______.
A buffer solution resists changes in its ______ when small amounts of acid or base are added.
Fill in the blank: The buffer capacity is maximum when pH = ______ for an acidic buffer.
Fill in the blank: The effectiveness of a buffer is called its ______.
True or False: A buffer can be prepared by mixing a strong acid with its salt.
True or False: A buffer solution can be prepared by mixing a weak base with its conjugate acid.
True or False: The addition of a large amount of strong acid to a buffer will eventually overwhelm its buffering capacity.
True or False: The addition of water to a buffer solution changes its pH significantly.
