calculate the normality of 6% (w/v) urea solution where the density of the solution is 2g/mol
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12th
Chemistry
Solutions
Expressing Concentration of Solutions
10 mL of 6
CHEMISTRY
10 mL of 6% (w/v) aqueous urea solution is diluted such that its molarity becomes 0.1 M. Volume of water added to make such solution is:
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6%(w/v) urea solution
6 g is present in 100 ml of water
60 g is present in 1000 ml of water or 1 litre
Molar mass of urea is 60 g
That means 1 mole of urea is present in 1 litre of solution so molarity of urea solution is 1M
M
1
=1M
M
2
=0.1M
V
1
=10mL
M
1
V
1
=M
2
V
2
V
2
=
0.1
10
=100 mL
Volume added to make 100 mL solution=100−10=90 mL
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