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Parminder Baldev Matthai
Asked: 2022-10-29T09:03:05+05:30 In:

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 M
B. (b)0.001 M
C. (c )0.01 M
D. (d)`10^(-4)M`

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 M
B. (b)0.001 M
C. (c )0.01 M
D. (d)`10^(-4)M`
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  1. 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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Yasmin Datta
Asked: 2022-10-29T03:53:06+05:30 In:

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 M
B. 0.001 M
C. 0.01 M
D. `10^(-4)` M

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 M
B. 0.001 M
C. 0.01 M
D. `10^(-4)` M
Parabola
Leave an answer

Leave an answer

Browse

1 Answer

  1. 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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