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20 mL of x M HCl neutralises 5 mL of 0.2...

20 mL of x M HCl neutralises 5 mL of 0.2 M `Na_(2)CO_(3)` solution to phenolphthalein end-point. The value of x is

A

`0.167M`

B

`0.133M`

C

`0.150M`

D

`0.05M`

Text Solution

Verified by Experts

The correct Answer is:
D
With phenolphthalein,
eq. `HCl=(1)/(2)` eq. `Na_(2)CO_(3)`
`20xx x xx1=(1)/(2)xx5xx0.2xx2impliesx=0.05`
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