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1. What is the concentration of the solution made by combining 40ml of ethanol with enough water to produce 100ml of the solution?

2. What is the concentration of the solution to produced 100 ml solution in a 70 ml ethanol?

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1. Volume of solute ( ethanol): 40 ml

Volume of solvent :( water): 100 ml

: Volume of solution = 40 + 100 = 140 ml

Concretion = Volume of solute/ Volume of solution

= 40/140 × 100

= 28.59% (approx.)

2. 100 ml solution to produced = ?

70 ml ethanol = 350

= ( 70 ml * 350 ml )/100

= 245 ml solution to produced in 350 ml

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