Which of the following will give a buffer solution with pH more than 7?
Correct answer: C. Weak base & its salt with a strong acid
- A. Weak acid & its salt with a strong base
- B. Weak acid & its salt with a weak base
- C. Weak base & its salt with a strong acid
- D. Weak base & its salt with a weak base
Explanation
The correct answer is Option C: 'Weak base & its salt with a strong acid'. A buffer solution with a pH greater than 7 is known as a basic buffer. Basic buffers are typically composed of a weak base and its salt with a strong acid. The weak base partially neutralizes the added strong acid, maintaining the solution's pH above 7. Options A and B involve weak acids, which do not contribute to a basic buffer, while Option D lacks the acid component necessary for buffering.
Last updated
About Acids, Bases and Salts
Acid and base behaviour is explained through the Bronsted-Lowry transfer of protons and the Lewis donation or acceptance of electron pairs. The topic includes pH, pOH, ionisation and water equilibrium, plus salt formation and hydrolysis, where a salt solution may become acidic, basic or neutral.
Practise Acids, Bases and Salts
314 free Acids, Bases and Salts MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
All of the following are postulates of Arrhenius theory of ionization except
Which of the following aqueous solution will be basic?
A start of reaction, concentration of reactants are on
An acid that can act as an oxidizing, dehydrating and acid-producing agent is
Which of the following compounds is the strongest Bronsted acid