Posted by Anonymous on Tuesday, November 2, 2010 at 9:58am.
You first need to balance the equation.
This will give you the ratio of moles of Ca(OH)2 to Ca3(PO4)2.
calculate the molecular mass of
Ca(OH)2 (=Mp) and Ca3(PO4)2 (=Mo)
from the molecular mass (Mp) of Ca3(PO4)2 calculate the number of moles
number of moles = 2.81/Mp
using the ratio from the equation calculate the number of moles (Mo) of Ca(OH)2 needed to form the 2.81/Mp moles
the mass required is then
Mo x molecular mass of Ca(OH)2
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