Which of the following aqueous solution will be basic?
Correct answer: C. Na2CO3
- A. NaCl
- B. Na2SO4
- C. Na2CO3
- D. FeCl3
Explanation
When dissolved in water, Na2CO3 undergoes hydrolysis, where water molecules react with the carbonate ion (CO3^2-) to produce hydroxide ions (OH-) and bicarbonate ions (HCO3-).This reaction increases the OH- concentration in the solution, making it basic. The equation for the hydrolysis is:CO3^2- + H2O ⇌ HCO3- + OH-
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
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
The strongest conjugate base is: