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Which of the following buffer solutions ...

Which of the following buffer solutions turns invalid on addition of 10 mL of 1.0 M HCI?

A

100 mL having 0.15 M ` NH_3 and NH_4CI` each

B

100 mL having 0.2 M `NH_3 and NHI_4Cl` each

C

100 ml having 0.2 M `NH_3` and 0.1 M `NH_4Cl` each

D

100 ml having 0.5 M `NH_3` and `NH_4Cl` each

Text Solution

Verified by Experts

The correct Answer is:
D
Millimoles of `NH_(3)=100 xx 0.05="5 millimoles"`
Added `HCl=10 xx 1.0 M=10" millimoles"`
`NH_3` gets completely neutralised it means solution turns acidic so, that.s not the buffer solution.
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