Buffer Solutions
Chemistry ⇒ Acids, Bases, and Salts
Buffer Solutions starts at 11 and continues till grade 12.
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A buffer solution contains 0.3\ \mathrm{M}\ \mathrm{NH_4OH} and 0.2\ \mathrm{M}\ \mathrm{NH_4Cl}. If K_b for \mathrm{NH_4OH} is 1.8 \times 10^{-5}, calculate the pOH of the solution.
A buffer solution contains 0.3\ \mathrm{M}\ \mathrm{NH_4OH} and 0.3\ \mathrm{M}\ \mathrm{NH_4Cl}. If \mathrm{p}K_b of \mathrm{NH_4OH} is 4.75, what is the pOH of the buffer?
A buffer solution contains 0.4\ \mathrm{M} acetic acid and 0.2\ \mathrm{M} sodium acetate. If \mathrm{p}K_a = 4.76, calculate the pH of the solution.
A buffer solution is prepared by mixing 0.1 mol of \mathrm{CH_3COOH} and 0.2 mol of \mathrm{CH_3COONa} in 1 L of water. If \mathrm{p}K_a = 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 \mathrm{NH_4Cl} and 0.5 mol of \mathrm{NH_4OH} in 1 L of water. If \mathrm{p}K_b of \mathrm{NH_4OH} is 4.75, what is the pOH of the buffer?
A buffer solution is prepared by mixing 0.5 mol of \mathrm{CH_3COOH} and 0.5 mol of \mathrm{CH_3COONa} in 1 L of water. If \mathrm{p}K_a of acetic acid is 4.76, what is the pH of the buffer?
Calculate the pH of a buffer solution containing 0.2\ \mathrm{M} acetic acid (\mathrm{p}K_a = 4.76) and 0.2\ \mathrm{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?
