Answer Posted / usha (gvk)

*** The equation for finding the pH of a solution is –log
([H+]). That is, the negative log of the molarity of the
hydrogen ions released by the compound in solution. Almost
no chemicals can release hydrogen ions with a molarity
greater than 1 or less than 10^-14. However, there are some
rare cases where the pH of a solution is not between 0 and
14. For example, 10 molarity hydrochloric acid (there are
ten moles of hydrochloric acid for every liter of water.),
has a pH of -1 (-log (10) =-1). But these are so rare in
occurrence.

why require to add enzymes in capsules dissolution only? is it require to tablet also?

257

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Did anybody have method for acetyl cysteine effervescnce tablet

1806

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how to select short coloum and long coloumn for new molecule

1809

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AT WHAT CONDITIONS WILL YOU ANALYSE A SAMPLE,WHICH ARE PRESERVED AT OTHER THAN THE AMBIENT CONDITIONS?(ie COLD STORAGE SAMPLES BELOW 20* CENTIGRADE?

1599

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what is mean by 40 in the dissolution basket mesh size?

284

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What is the use of tlc and hplc? And when and where use?

655

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what is the different in Total ash, sulphated ash, acid insoluble ash, alcoholic or non alcoholic ash?

9423

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In which situation we require to analytical method validation of excipient?

284

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how we can identify the impurity is coming below loq at transfering site?

376

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If inhouse hplc related substance method is completly diffrent from Usp for finished proďuct with diffrent impurities then how require to prove method equivalecy?

304

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what is diffrence between specificity and selecivity?

297

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For limit test of heavy metals in BP, Method C require that the substance is ignited at a temperature not exceeding 800 °C. Why confines such the temperature?

3485

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how require to set assay concentration for standard and sample?

355

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Please give idea about method development for cleaning method and how maco level establish

264

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if tech transfer fails whay require to do?

324

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