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2016-07-10T19:48:52+08:00
Gravimetric Analysis.

Notice that after oven drying, % of Water becomes 0.50 %.

Wt. of dried H20 = 5 % - 0.5 % = 4.5 %

In our original sample, we have 24.0 % P205 and 5 % Water and the rest is unknown, so assume that a 100 % sample is equivalent to 100 grams.

Wt. of the original sample after oven drying = 100 g - 4.5 g = 95.5 grams

% P2O5 remaining after oven drying = (24.0 g/95.5 g) x 100% = 25.13 %
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