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2014-08-26T20:22:12+07:00
NaOH 10%
gr NaOH = 10 gr
grair = 100-10 = 90 gr

mol NaOH = gr/Mr = 10/40 = 0,25 mol
mol air = gr/Mr = 90/18 = 5 mol

Xt = nt / (nt+np) = 0,25 / ( 0,25+5 ) = 0,25 /5,25 = 1/21 = 0,047
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