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2014-02-13T18:22:02+02:00
M cristalohidrat = 23·2 + 12 + 16·3 + 18x = 106 + 18x g/mol
      100 g cristalohidrat .......... 62,9345g H₂O
106+18x g cristalohidrat ........... 18x g H₂O

1800x = 62,9345 · (106+18x)
1800x = 6671 + 1132,8x
667,2x = 6671
x = 10 => Na₂CO₃ · 10H₂O
2 5 2