How to draw a flow diagram

How to draw a flow diagram

A water solution contains 62% Na2S22 together with 1.4% soluble
impurity. The solution is first diluted with water and then cooled
to 10 degrees Celsius where Na2S2O2.5h20 crystallises out. The
solubility of this hydrate at 10 degrees is 1.4 lb Na2S2O2.5H20 /
lb free water. The crystals are then separated in the first stage
filter and carry an adhering solution in the proportion: 0.058 lb
solution / lb crystals. The separated crystals are then dried in a
second stage to remove the remaining free water (but not the water
of hydration). If the final dry Na2S2O2.5h20 crystals must not
contain more than 0.18wt% impurity, calculate: The amount of water
added before cooling and the percentage recovery of the dried
crystals.

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