Question
What happens when CuSO _4 is dissolved in water? Identify correct statements from the following
MHT CET
Chemistry
Ionic Equilibrium
2026
MHT CET 2026 (11 April Shift 1)
MHT CET Chemistry Question (2026) — Solution
Options
- A. Anion of the salt react with water.
- B. Its solution will turn red litmus into blue.
- C. The pH of the solution will be less than 7.
- D. The CuSO _4 will not undergo hydrolysis reaction.
Answer
C. The pH of the solution will be less than 7.
Step-by-step solution
CuSO _4 is a salt of a weak base ( Cu(OH) _2) and a strong acid ( H _2 SO _4). When dissolved in water, the Cu ^ 2+ cation undergoes hydrolysis to produce H ^+ ions: Cu ^ 2+ + 2 H _2 O Cu(OH) _2 + 2 H ^+ Due to the generation of H ^+ ions, the solution becomes acidic. Therefore, the pH of the solution will be less than 7. The anion SO _4^ 2- does not undergo hydrolysis as it is derived from a strong acid. An acidic solution turns blue litmus red, not red litmus blue. Answer: The pH of the solution will be less than 7.
Related: Chemistry — Ionic Equilibrium · All PYQ Banks