How to prepare naoh by titration
Answers
In a wine laboratory, analyzing wine for TA, VA and S02 involves the use of a sodium hydroxide (NaOH) reagent. Winemakers usually buy sodium hydroxide solution of a known concentration (usually 0.1 Normal). This reagent is relatively unstable and its concentration changes over time. To ensure the accuracy of analytical results it is important to periodically check the concentration (Normality) of sodium hydroxide. If the concentration has changed then it must be readjusted to the original concentration or the new concentration (Normality) value needs to be used in calculations.
Sometimes a winemaker may wish to make his/her own NaOH solution instead of buying it. Whether making a new solution or checking the normality of an old solution it is important to know the procedure for making a standard (known concentration) solution of NaOH reagent. In the present article the standardization procedure along with the basic concept behind the titration procedure are explained.