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What is column in chromatography?
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what is differance between density and specificgravaty
Which column is more polar, C8 or C18?
6 Answers Cipla, Glenmark, Laurus, Torrent Power,
how to calibrate hplc & gc
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2. Two grams of Benzoic acid are dissolved in 200 ml of water and extracted with 200 ml of diethyl ether. The distribution coefficient of benzoic acid is 100, and its dissociation constant is 6.5 10-5. Calculate the distribution ratio (D) of benzoic acid at pH 2, 5, and 6. 3. Calculate D at pH 2 to 10 (1 unit apart) in the above problem, and plot D versus pH.
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?
how we can identify the impurity is coming below loq at transfering site?
why plane of polarized light rotated by opticaly active compunds?
why we are using buffer solutionas as a mobile phase in hplc.
Organic Chemistry 
