Why does a solution of a weak base and its conjugate acid act as a better buffer than does a solution of the weak base alone
A buffer is a solution that can resist pH change upon the addition of an acidic or basic components. It is able to neutralize small amounts of added acid or base, thus maintaining the pH of the solution relatively stable. This is important for processes and/or reactions which require specific and stable pH ranges.
A buffer is simply a mixture of a weak acid and its conjugate base or a weak base and its conjugate acid. Buffers work by reacting with any added acid or base to control the pH. For example, let's consider the action of a buffer composed of the weak base ammonia, NH3, and its conjugate acid, NH4 +. When HCl is added to that buffer, the NH3 "soaks up" the acid's proton to become NH4 +. Because that proton is locked up in the ammonium ion, it proton does not serve to significantly increase the pH of the solution. When NaOH is added to the same buffer, the ammonium ion donates a proton to the base to become ammonia and water. Here the buffer also serves to neutralize the base.
As the above example shows, a buffer works by replacing a strong acid or base with a weak one. The strong acid's proton is replaced by ammonium ion, a weak acid. The strong base OH- was replaced by the weak base ammonia. These replacements of strong acids and bases for weaker ones give buffers their extraordinary ability to moderate pH.
This phenomenon, to effectively maintain a pH range, can't be observed in case of weak base alone.
Why does a solution of a weak base and its conjugate acid act as a better...
a buffer is a solution that has a Weak acid in equlibirum with its conjugate base. So can a buffer solution has a weak base in equlibirum with its conjugate acid? So basically, to create a buffer, you can mix a weak acid with its conj. base OR a weak acid + strong base OR a weak base with a strong acid? Am i Correct?
please help l, will rate! thabk you!! Why does a solution of a weak acid and its conjugate base act as a better buffer than does a solution of the weak acid alone? The presence of both the acid and the base provides a significant concentration of both an acid and a base, making it harder to change the pH A solution of a weak acid alone has no base present to absorb added acid. The presence of both the...
Explain why a buffer always consists of a weak acid and its conjugate base, rather than a strong acid and base?
If a buffer solution is 0.520 M in a weak acid (Ka-5.4 x10 and 0.220 M in its conjugate base, what is the pH? Number If a buffer solution is 0.520 M in a weak acid (Ka-5.4 x10 and 0.220 M in its conjugate base, what is the pH? Number
Question 1 (2 points) The relationship between a weak acid and its conjugate base at the 1/2 neutralization point is: the weak acid's concentration is greater than the conjugate base concentration. the weak acid's concentration is less than the conjugate base's concentration the weak acid's concentration is 1/2 the concentration of the conjugate base's concentration the weak acid and conjugate base have the same concentration. Question 2 (3 points) ✓ Saved The pka of acid is 4.8. Determine the acid's...
A buffer is a solution that is a mixture of either a weak acid and its conjugate base or a weak base and its conjugate acid. When strong acids or strong bases are added, buffers either accept protons when they are in excess or donate protons when they have been depleted to minimize changes in pH. Which of the statements correctly describe the properties of a buffer? Select one or more: a. The weak base of an alkaline buffer will...
A buffer solution includes a weak acid and its conjugate base. Write a balanced chemical equation for the equilibrium reaction occurring in a buffer containing NH3and NH4Cl. Write the equation so that its equilibrium constant is equivalent to Ka.
A buffer solution is 0.151 M in a weak acid, and 0.371 M in its conjugate base. The pKa of the weak acid is 8.025. What is the pH of the buffer? Report your answer with 2 decimal places.
first option conjugate base or weak acid 2nd absorbs or releases 3rd. conjugate bade or weak acid 4th. absorbs or releases Examine the acetate buffer as it responds to the addition of hydrochloric acid and the addition of sodium hydroxide. CH3CO2H absorbe The buffer can maintain the solution at a steady pH, because when base is added, the conjugate base Hions, and when acid is added, the conjugata base CH3CO2" absorbs Hions.
Which concentration of a weak acid (HA) and its conjugate base (A-) will make a buffer solution whose pH value is equal to its pKa? (HA) = 0.05 M, (A-) = 0.07 M HA = 0.05 M, (A-) = 0.05 M more than one answer is correct HA = 0.05 M, (A-) = 0.01 M