How to Perform a Recrystallization ?
- 4 Answers
- 16418 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / taksena gurung
1 First choose a proper solvent to dissolve the impure
substance. the solvent should be like that, in cold
condition the substance is insoluble or partially soluble,
and in hot condition the substance should be completely
soluble.
2 After selecting the suitable solvent, dissolve the given
substance in it, and heat it till the substance completly
dissolve forming clear solution.
3 now filter this hot solution immediatly through the
filter paper. the insoluble impurity remains on the filter
paper and collect the filtrate in a dish and allow to cool
without disturbng the container.
4 the filtrate on cooling gives crystals which are pure,
homogenous, and bigger in size.
| Is This Answer Correct ? | 32 Yes | 0 No |
Answer / bhavin mehta
Recrystallization is a laboratory technique used to purify
solids based on their different solubilities.
Recrystallization Steps are
1)Add a small quantity of appropriate solvent to an impure
solid.
2)Apply heat to dissolve the solid.
3)Cool the solution to crystallize the product.
4)Use vacuum fitration to isolate and dry the purified
solid.
| Is This Answer Correct ? | 10 Yes | 5 No |
Answer / dinesh gurav
Recrystallisation is a crystallisation process of impure or
crude solid materials in different solvents and at diff.
experimental parameters like temp,pH and quantity of
solvents to elute out the unwanted compounds
[Impurities,Polymorphs] to get a compound of desired
quality.
| Is This Answer Correct ? | 4 Yes | 2 No |
Answer / tulasi
if compoune is dissolved in acid
then we have to add base and viceversa
| Is This Answer Correct ? | 1 Yes | 9 No |
Why do we use 500ppb sucrose and 500ppb 1,4 benzoquinone in TOC calibration?
why SGF media used for dissolution . What is the use of it .can we use other media of lower pH instead ot this?
What is descriminatory disolution medium ?
3 Answers Cipla, Graviti Pharmaceuticals,
Can you please give a suitable definition and an example for understanding the words purity and potency.
6 Answers Cipla, Malladi Drugs and Pharmaceuticals, Reddy Labs,
What is the name of the detector used in TOC?
How to estimate potassium?
if the flow rate is increases then any changes in retention time in hplc
Polarized meter calibration, 1. Method name? 2. Which solution use? 3.why?
What is the principle of HPLC?
how much wave length of Soduim vapour lamp used in polarimeter
2 Answers Reddy Labs, Torrent Pharma,
what is difference between drug products and drug substance?
What is void volume & dead volueme
Organic Chemistry 
