How to standardise NaOH? [closed]








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My aim is to "To determine the concentration of citric acid in lemon juice using titration technique." and as following i need to standardise the NaOH in order to titrate it with validity. Is there a procedure and step to standardising NaOH. Thank you




You should find it in any analytic chemistry textbook, considering volumetric methods. 
We did so in the high school.


In short, a solution of known molar concentration of well defined acidic substance is made, that get titrated by the $\ce{NaOH}$ solution.


Typically oxalic acid $\ce{(COOH)\_2 . 2 H2O}$, weighted at good scales, preparing solution $\pu{0.05 mol / l}$.


When you Google "acidimetric titration sodium hydroxide oxalic acid" , you get tons of references, from illustrating videos to PDF documents.


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