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.

how require to fix the linearity and accuracy cincentration range?

1737

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why require the ph, buffer during hplc mobile phase?

922

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How can we calculate offset value pH measurment

1555

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what is the difference between potentiometric titration and karl fischer titration?

3257

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

1211

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What is shaking level in GC?

833

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in which situation require to take incident in validation?

1783

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What is dose dumping? why require to do?

1042

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if your impurity coeluting with each other in that situation how require to set specification? is it acceptable?

1044

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what is the purge flow & how to calculate

2728

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What is column in chromatography?

2289

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in OSD forms require to use gas chromatography?

874

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why multimedia dissolution require to do?

867

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I have compare C2H2-air and C2H2-N2O flame AAS on determination calcium. Both use same range of std to plot calibration curve. (2-6ppm) When i measure the sample with phosphate, KCl and LaCl, C2H2-N2O flame give false positive result, around 0.5ppm. When i measure the sample with phosphste, KCl and EDTA. C2H2-N2O flame also give 0.5ppm false positive. But both above mentioned sample would not give false positive when measured by C2H2-air flame. What is the reason?

3584

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for which product require to do content uniformity? what is limit of cu?

875

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