Calculate the molarity of a solution of ethanol which contain 15.87 gram of ethanol in 168 gram of water.
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weight of water = 168gm
density of water = 1gm/cm^3
Volume = weight × density
v = 168 ml
or 168/1000leter
number of mols of ethenol=
15.87/62= 0.255
molarity = number of mols/volume of solution (leter)
= 0.255/168/1000
= 0.255×1000/168
= 255/168
= 1.51mol/leter Ans
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