Q.
What is the concentration of sugar (C12H22O11) in mol L-1 if its 20 g are dissolved in enough water to make a final volume up to 2L in mol L-1?
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a
0.0592
b
0.0292
c
0.0375
d
0.0711
answer is B.
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Detailed Solution
Molar mass of the sugar, C12H22O11, m=(12×12.01)+(22×1.0079)+(11×16.00)=342.2938 g mol-1≈342 Given, w=20 g,V=2 L Molarity =wm×V( in L)=20342×2=0.0292 mol L-1= 0.0292M
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