Question

Which will make basic buffer?

Options

• 50 mL of 0.1 M NaOH + 25 mL of 0.1 M CH₃COOH

• 100 mL of 0.1 M CH₃COOH + 100 mL of 0.1 M NH₄OH

• 100 mL of 0.1 M HCI + 200 mL of 0.1 M NH₄OH

• 100 mL of 0.1 M HCI + 100 mL of 0.1 M NaOH

Answer 1

100 mL of 0.1 M HCI + 200 mL of 0.1 M NH₄OH

Explanation:

Basic buffer is the solution which has weak base and its salt

\[\ce{\underset{200 ml}{NH4OH} + \underset{100 ml}{HCl} -> \underset{Salt}{NH4Cl} + H2O + \underset{(100 ml weak base)}{NH4OH}}\]