Which of the following statements is wrong?
Correct answer: C. buffer capacity of a buffer solution is maximum when the ratio of salt/acid or base is 1
- A. for an acid buffer solution the pH can be increased by increasing the concentration of salt
- B. for a basic buffer solution the pH can be increased by decreasing the concentration of base
- C. buffer capacity of a buffer solution is maximum when the ratio of salt/acid or base is 1
- D. The number of moles of acid or base required by one litre of buffer solution to alter its pH by one unit is called buffer efficiency
Explanation
In an ideal buffer solution, the maximum buffer capacity is achieved when the concentrations of the weak acid (HA) and its conjugate base (A-) are equal. This equal concentration ensures that the buffer components can effectively neutralize added acid or base without causing significant changes in pH. When the ratio of salt/acid or base is 1, any added acid or base is readily consumed by the equal concentration of the conjugate base or acid, respectively. This balanced ratio allows the buffer system to maintain a relatively stable pH over a wide range of acid or base additions.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Chemical Equilibrium
Reversible reactions reach dynamic equilibrium when forward and reverse rates become equal, and Le Chatelier's principle predicts the effect of changing concentration, pressure or temperature. The chapter also covers solubility product, the common ion effect, buffer action and the conditions used in Haber's process, with equilibrium shifts distinguished from changes in the equilibrium constant.
Practise Chemical Equilibrium
625 free Chemical Equilibrium MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Chemical Equilibrium questions
In a buffer solution consisting of a weak acid and its salt, the ratio of concentration of salt to acid is increased 10-fold, then the pH of the solution
The most important buffer in blood consists of
Henderson's equation used to calculate the pOH of a basic buffer is
When acid is added to a buffer solution composed of a weak base B and its salt with strong acid, then the reaction that occurs to maintain the pH is
The pKa of certain weak acid is 4.0. What should be the salt-to-acid ratio if we have to prepare a buffer with pH = 3 using the acid and of its salts?
The solubility product of a sparingly soluble salt AB at room temperature is 1.21 x 10^-6 . Its molar solubility is