250 ml of a sodium carbonate solution contains 2.65 g of Na2CO3 l. If 10 ml of this solution is diluted to 1 L, what is the concentration of the resultant solution ?
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a
0.1 M
b
0.01 M
c
0.001 M
d
10-4 M
answer is C.
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Detailed Solution
Molarity =W(gm)×1000 molecular wt. ×V(ml)=2.65×1000106×250=0.1M10ml of this solution is diluted to 1000mlM1V1=M2V210×0.1=1000×xx=0.1×101000=0.001M