Anonymous
Anonymous asked in Science & MathematicsChemistry · 1 decade ago

What is the percentage of water in MgSO4 * 7H20?

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  • 1 decade ago
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    To calculate the wt% H2O in MgSO4*7H2O, the MW of the hydrated salt needs to be calculated:

    MW (Mg) = 24.3

    MW (S) = 32

    MW (O) = 16

    MW (H2O) = 18

    so MW (MgSO4*7H2O) = 246.3 g/mol

    the 7 H2O molecules have a mass of 126 g

    so to get the wt% H2O

    (126/246.3)*100 = 51.16%

  • Anonymous
    5 years ago

    Both the red and white cabbage are valuable ingredients in a salad but only in reasonable quantities, because the sulphur and chlorine content is high. The red cabbage has a slightly tougher fiber than the white. Its chlorine, calcium and sodium content is nearly 50% more than that of the white, while on the other hand the white cabbage has about 65% more potassium, nearly ten times more iron and about three times as much silicon as the red cabbage. The water content of both is approximately 90%.

  • 1 decade ago

    total mass of salt=24+32+64+7*18=246

    total mass of water in the salt=7*18=126

    % of water=126/246x100%=50.12

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