find the percentage mass of water in Epsom salt MgSO4. 7H2O
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Answer:
Relative molecular mass of MgSO4.7H2O
=24+32+(16×4)+7(2+16)
=24+32+64+126=246
26g of Epsom salt contains 126g of water of crystallisation.
Hence, 100g of Epsom salt contains 100×126/246
The % of H2O in MgSO4.7H2O=51.2
Explanation:
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