1. Find the Molar Mass of Each Component
* Sodium Sulfate (Na₂SO₄):
* Na: 22.99 g/mol * 2 = 45.98 g/mol
* S: 32.06 g/mol
* O: 16.00 g/mol * 4 = 64.00 g/mol
* Total: 45.98 + 32.06 + 64.00 = 142.04 g/mol
* Water (H₂O):
* H: 1.01 g/mol * 2 = 2.02 g/mol
* O: 16.00 g/mol
* Total: 2.02 + 16.00 = 18.02 g/mol
2. Calculate the Total Molar Mass of Sodium Sulfate Decahydrate
* Na₂SO₄: 142.04 g/mol
* H₂O: 18.02 g/mol * 10 = 180.20 g/mol
* Total: 142.04 + 180.20 = 322.24 g/mol
3. Calculate the Percentage of Water
* (Mass of Water / Total Mass of Sodium Sulfate Decahydrate) * 100%
* (180.20 g/mol / 322.24 g/mol) * 100% = 55.91%
Therefore, approximately 55.91% of Sodium Sulfate Decahydrate is water.
