Product Application
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Calculation:
Volume of sodium hydroxide = no. of drops x drop value of pipette = V1 Volume of water = no. of drops of water x drop value of the pipette= V2 Normality of sodium hydroxide=N1
Total acidity (mg/L)= V1 x N1 x 100 x 1000/V2
Result: The acidity of the sample water is :__________
Procedure:
. 20 drops of water was taken in a dry test tube.
. Adding 1 drop of Phenolphthalein indictor to this tube.
. Adding sodium hydroxide drop by with a calibrated pipette till the colour changes from colourless to pink. Count the drops.
