In acid base titration, after complet consumption of HCl by
NaOH, addition of next drop of NaOH will give pink colour
with phenolpthalein indicator. Why this pink colour appear?
Why not blue, black, green or anything elese?
Answer Posted / arti naik
The pink colour appears due to the change in the structure
of the phenolphthalein indicator and it forms a disodium
salt due to the base NaOH which then gives it a pink colour.
Is This Answer Correct ? | 7 Yes | 3 No |
Post New Answer View All Answers
Home heating oil or furnace oil what is made from? Can (base oil plus diesel/kerosen) = home heating oil?
Why we use potassium dichromate in uv calibration Exact reason behind it??
What is viod volume and peak purity in HPLC?
in DMF having extra impurities and in api COA also having extra imp than USP or BP product then how require to proceed?
we can use expired sample for validation and analyst qualification?
What is importance of pH in the Heavy metal test and How it effect on the test results?
What is aggregate and fragments in SEC?
How to calculation of residual solvent methanol (3000 ppm) standard solution, and how many quantity used of test sample
in gas chromatography what is the difference between gas flow rate and average linear velocity ?
about method developement in hplc
why salisylic acid not using now days for disdolution calibration?
how to select short coloum and long coloumn for new molecule
how to calibrate hplc & gc
How to compare XRD graphs against standard and carry polymorpism study of API's by powder XRD method?
If vendor having more imp than monograph then how to proceed? and how to set spec?