Question

Calculate the percentage by mass of water of crystallization in Epsom salts

Answer 1

Answer:

51. 21

Explanation:

relative molecular mass of mgso4. 7h2o

= 24+32+16×4+7×(2+16)

= 24 +32+64+126

=246

246g of Epsom salt contains 126g of water

.•. 100g will contain 126×100÷246

= 12600÷246

= 51.21g of H2O

answer .. the% of h2o in mgso4. 7h20 = 51. 21

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Answer 2

Answer: I think it can help you

Explanation:

Step 1

MgSO4.7H2O is also known as Epsom salt and it contains 7 molecules of water as water of crystallisation.

Step 2

Molecular mass of Epsom salt

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Step 3

Molecular mass of water = 18