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

20 mL of x M HCl neutralises 5 mL of 0.2 M Na_(2)CO_(3) solution to ph

1.	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
Answer» `0.167M` `0.133M` `0.150M` `0.05M` Solution :With phenolphthalein, EQ. `HCl=(1)/(2)` eq. `Na_(2)CO_(3)` `20XX X xx1=(1)/(2)xx5xx0.2xx2impliesx=0.05`