An unknown volume of 40% (w/w) NaOH solution of specific gravity 1.6 is diluted until the specific g

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An unknown volume of 40% (w/w) NaOH solution of specific gravity 1.6 is diluted until the specific gravity of the solution becomes 1.1. The strength of the resulting solution is

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$\left( V_{1} 	imes 16 ight) 	imes \frac{40}{100} = \left( V_{1} + V_{2} ight) 	imes 1.1 	imes \frac{x}{100}$and V1× 1.6 + V2 × 1.0 = (V1 + V2) × 1.1∴ Strength of final solution, x = 9.7% (w/w) and 10.67% (w/v).

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