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Stanpol
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How to understand this form of writing the solution — ( Some salt • n H2O)?

For example — "high purity chloride salt of Zinc (ZnCl2.2H2O)" or "various concentrations of FeCl2.4H2O"

What does the number before H2O mean?

Stanpol
  • 701
  • 1
  • 6
  • 8