Add two drops of phenolphthalein indicator; if the pH is above 8.3, colour of solution becomes pink. Titrate against standard sulphuric acid in the burette, till the colour just disappears. Note down the volume(V1). Then add two drops of methyl orange indicator, the colour turns yellow. Again titrate against acid, until the colour turns to orange yellow. Note down the total volume (V2).
Add two drops of phenolphthalein indicator; if the pH is above 8.3, colour of solution becomes pink. Titrate against standard sulphuric acid in the burette, till the colour just disappears. Note down the volume(V1). Then add two drops of methyl orange indicator, the colour turns yellow. Again titrate against acid, until the colour turns to orange yellow. Note down the total volume (V2).
ENVIRONMENTAL-ENGG-2-manual.docx