250 ml of a sodium carbonate solution contains 2.65 grams of `Na_(2)CO_(3)`. If 10 ml of this solution is diluted to one litre, what is the concentration of the resultant solution (mol. Wt. of Na_(a)`CO_(3)=106`)A. 0.1 MB. 0.001 MC. 0.01 MD. `10^(-4)` M

250 ml of a sodium carbonate solution contains 2.65 grams of `Na_(2)CO

1.	250 ml of a sodium carbonate solution contains 2.65 grams of `Na_(2)CO_(3)`. If 10 ml of this solution is diluted to one litre, what is the concentration of the resultant solution (mol. Wt. of Na_(a)`CO_(3)=106`)A. 0.1 MB. 0.001 MC. 0.01 MD. `10^(-4)` M
Answer» Correct Answer - B Molarity `=(W(gm)xx1000)/("molecular wt."xxV(ml.))=(2.65xx1000)/(106xx250)=0.1 M`. 10 ml of this solution is diluted to 100 ml `M_(1)V_(1)= M_(2)V_(2)` `10xx0.1=1000xx x` `x=(0.1xx10)/1000=0.001 M`

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250 ml of a sodium carbonate solution contains 2.65 grams of `Na_(2)CO_(3)`. If 10 ml of this solution is diluted to one litre, what is the concentration of the resultant solution (mol. Wt. of Na_(a)`CO_(3)=106`)A. 0.1 MB. 0.001 MC. 0.01 MD. `10^(-4)` M

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