NEETChemistryIonic Equilibrium
Assertion (A) The pH of a buffer solution containing equal moles of acetic acid and sodium acetate is 4.8 ( p K_a of acetic acid is 4.8). Reason (R) The ionic product of water at 25^ C is 10⁻¹⁴ ~mol ^2 . L ⁻² . The correct answer is
Options
- ABoth (A) and (R) are true and (R) is the correct explanation of (A)
- BBoth (A) and (R) are true and (R) is not the correct explanation of (A)
- C(A) is true but (R) is not true
- D(A) is not true but (R) is true
Correct answer
B. Both (A) and (R) are true and (R) is not the correct explanation of (A)
Step-by-step solution
Both (A) and (R) are true statement but (R) is not the correct explanation of (A). pH of a buffer solution is given by Henderson-Haselbalch equation. aligned & pH = p K_a+ [ salt ] [acid ] & pH = p K_a( when [ salt ]=[ acid ]) & aligned