Interested to Buy Any Domain ? << Click Here >> for more details...
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?
- 3 Answers
- 11550 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / sarma dvv
Phenolpthalein indicator pH range = 8.2 To 10.0.
In this pH region only Phenolpthalein indicator shows pink
colour. below this pH it was colour less.
In acid base titration, Hcl neutralisation by NaOH,after
completion of neutralisation,affition of next drop of NAOH
the pH of the solution will be above 8.2. for this reason
it was showing pink colour
| Is This Answer Correct ? | 31 Yes | 3 No |
Answer / 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 |
Answer / umesh patel
in basic media(in NaoH), phenolphthelin shows pink color
only
colorless if pH of the media goes below 8
pink color will appear if pH goes beyond the pH of 10.00
| Is This Answer Correct ? | 11 Yes | 8 No |
we are performed SOR for a particular product the limit is -6 to -10.We face particular bathes it is not meeting the specification.we performed diffrent instrument diffrent analyst we are getting diffrent diffrent results.solvent is dimethyl sulfoxide what could be the reasion
what is difference between moisture contents and water contents ?
12 Answers Cipla, Hetero, USM,
What is the difference between low pressure gredient and high pressure gredient in hplc instrument?
How to estimate potassium?
What is the composition of K.F
in karl fischer reagent which solvent is used for dissolving iodine sulphur dioxide and imidazole
If we are getting split peak in Chromatogram,what we can do?
how ir specrometer is calibrated ?
Calculate the water content in Di Sodium Tartrate (DST) based on molecular weight?
How to now that my acid is contact with base or base is contact with acid in drugs, is there any techniq to identify the formation of salt(drug)
what is the diffrence between absorbance and absorption in the beer,s lamber formula ?
difference between HPLC & LC-MS
Organic Chemistry 
