Question

किससे क्षारीय बफर बनेगा?
(1) 0.1 M NaOH का 50 mL+ 0.1 M CH₃COOH का 25 mL
(2) 0.1M CH₃COOH का 100 mL+ 0.1M NaOH का 100 mL
(3) 0.1 M HCl का 100 mL + 0.1 M NH₄OH का 200 mL
(4) 0.1 M HCl का 100 mL+ 0.1 M NaOH का 100 mL

Answer 1

Answer:

I think c is the correct answer

Answer 2

Answer: (3)

Explanation: milimoles (mmol) of the acid is 10 while mmol of the base is 20. So 10 mmol acid reacts with 10 mmol of base to give 10 mmol of the salt and 10 mmol of the base remains unreacted.

Hence after the reaction, a salt and its weak base are present in the solution with equal amount and this constitute a basic buffer.