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+1 vote
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in Mole Concept by (65.8k points)
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A Solution of density 1.6 g / mL is 67% by weight. What will be the % by weight of the Solution of same acid if it is diluted to density 1.2 g / mL? 

1 Answer

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Best answer

Consider 100 mL of Solution 67% by weight 

∴ Wt. of Solution = 100 x 1.6 = 160 g

Now suppose X g of H2O added in it Wt. of new Solution = (160 + X) g 

Also volume of new Solution = (100 + X) mL 

∴ Wt. of new Solution = (100 + X) x 1.2 g = (120 +1.2 X)g 

∴160 +X = (120 + 1.2 X) g or X = 200 mL or 200g

∴ % by weight of new Solution 

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