Question
20ml 0.2 M NaOH solution is taken in a conical flask and is titrated with 0.05 M oxalic acid (H2C2O4) solution using phenolphthalein as the indicator. What is the concentration of oxalate C2O4‾2 ion in the conical flask just when the pink colour disspears ?
a)M/30 b)M/25 c)M/20 d)M/60