Q. Which will make basic buffer ?
A) 50 mL of 0.1 M NaOH + 25 mL of 0.1 M $CH_3COOH$
B) 100 mL of 0.1 M $CH_3COOH$ + 100 mL of 0.1M NaOH
C) 100 mL of 0.1 M HCl + 200 mL of 0.1 M $NH_4OH$
D) 100 mL of 0.1 M HCl + 100 mL of 0.1 M NaOH
Explanation
[Solution] 10 mmol HCl neutralises half of the 20 mmol $NH_4OH$, leaving a mixture of $NH_4OH$ and $NH_4Cl$, which is a basic buffer. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.