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. (a)0.1 MB. (b)0.001 MC. (c )0.01 MD. (d)`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. (a)0.1 MB. (b)0.001 MC. (c )0.01 MD. (d)`10^(-4)M`
Answer» Correct Answer - B Molarity`=(W(g)xx1000)/("molecular wt". xxV(ml.))` `=(2.65xx1000)/(106xx250)=0.1 M` `10 ml` of this solution is diluted to `1000 ml N_(1)V_(1)=N_(2)V_(2)` `10xx0.1-1000xxx` `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. (a)0.1 MB. (b)0.001 MC. (c )0.01 MD. (d)`10^(-4)M`

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