Posted by lyne on Friday, December 12, 2008 at 11:20am.
Ca(OH)2 + H2SO4 -> 2 H2O + CaSO4
The molar mass of Ca(OH)2 is 40 + 2*17 = 74 g/mole. So you consume 3.15 moles of Ca(OH)2 and form twice as many moles of H2O. Use the ideal gas law to convert that to VAPOR volume.
I don't see how dimensional analysis helps with this, except to keep track of dimensions.
You need to use dimensional analysis only when the two materials react in other than a 1:1 ratio.
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