Buffer solution, pH 4.00 at 20° C
3.2 Dissolve 10.21+0.01 grams of potassium hydrogen phthalate (KHC8O4H4) in water, transfer without loss into a 1 litre standard flask, make up to the mark and mix.
Keep this solution in an airtight vessel.
3.2 Dissolve 10.21+0.01 grams of potassium hydrogen phthalate (KHC8O4H4) in water, transfer without loss into a 1 litre standard flask, make up to the mark and mix.
Keep this solution in an airtight vessel.