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The percentage of water of crystallization in ZnSO4.7H2O is [Zn = 65, S = 32, O ...



Discussion (4)

  • Molecular mass of ZnSO4.7H20
    Add the molar masses:
    65 + 32 + 16 \(\times\) 4 + 7(18) = 287
    The mass of water of crystallisation = 126
    \(\frac{126}{287} \times \frac{100}{1} = \frac{12600}{287}\)
    = 44%

  • Olanitee Akindayo

    Add the molar masses:
    65 + 32 + 16 \(\times\) 4 + 7(18) = 287
    The mass of water of crystallisation = 126
    \(\frac{126}{287} \times \frac{100}{1} = \frac{12600}{287}\)
    = 44%

  • Molecular mass of H20. *100%
    ----------------------------
    Molecular mass of ZnSO4.7H20
    7(2+16). *100
    ----------
    (65+32+64)+7(2+16)
    126. *100
    -------
    287
    12600/287=43.90%~44%

  • Molecular mass of ZnSO4.7H20
    (65 + 32 + 64) + 7(2 + 16)
    161 + 126 = 287g/mol
    Percentage of water of crystallization
    126*100/287 = 43.90~44%