Unknown Acid

Some articles on acid, acids:

Equivalent Weight - Use in Volumetric Analysis
... It is necessary to calculate the mass of a solid acid which will react with about 20 cm3 of this solution (for a titration using a 25 cm3 burette) suitable solid acids include oxalic acid dihydrate, potassium ... The equivalent weights of the three acids 63.04 g, 204.23 g and 389.92 g respectively, and the masses required for the standardisation are 126.1 mg, 408.5 mg and 779.8 mg respectively ... relative uncertainty in the mass of oxalic acid dihydrate would be about one part in a thousand, similar to the measurement uncertainty in the volume ...

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