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Question

Calculate the concentration i.e., %(w/v) of the solution (BaCl2 in H2O). If 10 g of BaCl2 is dissolved in 90 g of water. The density of the solution is 1.09 g/mL.

A
10.90%
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B
9.17%
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C
1.09%
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D
0.91%
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Solution

The correct option is A 10.90%
Mass of the solution =10 g + 90 g =100 g
We know that:
Density=MassVolume

Volume=MassDensity

Volume=100 g1.09 g\mL=91.74 mL

%(w/v)=mass of the solute in gvolume of the solution in mL×100=1091.74×100=10.90%

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