The observation on the crystals after two days are,
- they become bigger and glossier . like sedimentary stones
What happen when sodium carbonate decahydrate crystals is exposed in air?
- Since,sodium carbonate decahydrate contains 9 water molecules
- This 9 water molecules loss when exposed in air and leave only sodium carbonate in powder form with one one water molecule.
- The process of removal of water molecule of crystallization is called efforescence.
- Equation : [tex]Na_{2}CO_{3}.10H_{2}O[/tex] ( hydrated crystal)→[tex]Na_{2}CO_{3}.H_{2}O(powder) + 9H_{2}O[/tex]
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