Which of the following form acidic buffer?
Correct answer: D. All of these
- A. Acetic acid / sodium acetate
- B. Phosphoric acid / potassium dihydrogen phosphate
- C. Formic acid / sodium formate
- D. All of these
Explanation
An acidic buffer solution is typically composed of a weak acid and its conjugate base (in the form of a salt). Each pair in the options includes a weak acid and its corresponding salt: acetic acid with sodium acetate, phosphoric acid with potassium dihydrogen phosphate, and formic acid with sodium formate. Therefore, all these combinations can form acidic buffers. Selecting 'All of these' as the correct answer is appropriate because every pair listed fulfills the criteria for forming an acidic buffer.
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