How toPreperation and standardisation of 0.1n oxalic acid?

To prepare 0.1N oxalic acid solution, dissolve 6.3g of oxalic acid dihydrate (H2C2O4·2H2O) in 1 liter of distilled water. To standardize the solution, titrate it against a standardized solution of sodium hydroxide (NaOH) using phenolphthalein as an indicator until a faint pink color persists for at least 30 seconds. Calculate the concentration of the oxalic acid solution using the equation: (N1)(V1) = (N2)(V2), where N is the normality and V is the volume. Adjust the concentration accordingly for accuracy.