[tomlee]

thank you very much

[Arkcon]

Use base.

Ask a s* question, get a s* answer.

[rotator]

prepare a .1 normal solution of sod.hydroxide by dissolving 4 g in 100ml distilled water and prepare .1 normal oxalic acid soln by dissolving 4.5g of dehydrated or6.3 of dihydrated oxalic acid and make volume upto 100ml,standardise base by using phenolphthalein indicator and it is your primary standard ,now use it to standardise your acid.

[Borek]

Na₂CO₃ or Na₂B₄O₇·10H₂O are much better choice of primary substance for this case.