Standardization of NaOH Solution Using Oxalic Acid

To determine the molarity of an NaOH solution by titrating it with Oxalic acid (a primary standard).

Oxalic acid is a primary standard. It can therefore be used to determine the molarity of an NaOH solution.

Oxalic acid is a weak acid. Therefore this is an example of a weak acid-strong alkali titration and the indicator is phenolphthalein.

You should be aware that oxalic acid and oxalates are EXTREMELY POISONOUS AND CAR SHOULD BE EXERCISED. Ensure that you wash your hands after the experiment and especially before eating anything. In addition oxalic acid is not very soluble and will require the use of a glass rod to dissolve it. Ensure that you do not add more then the required volume of water in this process.

1. With the aid of an electronic balance weigh out 1.575g of hydrated Oxalic acid.

Burette Solution: Oxalic acid solution

Total % Error = All errors added up.

I.e. no. of moles of(COOH)©ü H©üO = .05 ¢¥ (24.55/1000)

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