subject

Buffer Solutions

Chemistry ⇒ Acids, Bases, and Salts

Buffer Solutions starts at 11 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Buffer Solutions. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 11
A buffer solution contains 0.3 M NH₄OH and 0.2 M NH₄Cl. If Kb for NH₄OH is 1.8 × 10⁻⁵, calculate the pOH of the solution.
A buffer solution contains 0.3 M NH₄OH and 0.3 M NH₄Cl. If pKb of NH₄OH is 4.75, what is the pOH of the buffer?
A buffer solution contains 0.4 M acetic acid and 0.2 M sodium acetate. If pKa = 4.76, calculate the pH of the solution.
A buffer solution is prepared by mixing 0.1 mol of CH₃COOH and 0.2 mol of CH₃COONa in 1 L of water. If pKa = 4.76, what is the pH of the buffer?
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?
A buffer solution is prepared by mixing 0.25 mol of NH₄Cl and 0.5 mol of NH₄OH in 1 L of water. If pKb of NH₄OH is 4.75, what is the pOH of the buffer?
A buffer solution is prepared by mixing 0.5 mol of CH₃COOH and 0.5 mol of CH₃COONa in 1 L of water. If pKa of acetic acid is 4.76, what is the pH of the buffer?
Calculate the pH of a buffer solution containing 0.2 M acetic acid (pKa = 4.76) and 0.2 M sodium acetate.
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.
State the Henderson-Hasselbalch equation for an acidic buffer.
What happens to the pH of a buffer solution when a small amount of strong base is added?
What is a buffer solution?
What is the main function of a buffer in a chemical reaction?