Answer Posted / bhupalreddy

Weight of the substance
Tapped density = --------------------------
Volume of the substance (after tapping)

The density of solids normally expressed in g per cm3
and liquids is normally expressed in g per ml. However
because powder volumes are measured in cylinders graduated
in ml, tapped density is expressed in g/ml.

WHY pKa value is more important than pH value of the mobile phase in HPLC?

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