Solution Percentage Strength

by elizabeth
(lusa)

If you mix 100 ml of 70% alcohol with 100 ml of 90% alcohol, what is the percentage of alcohol in the final mixture?

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Solution Percentage Strength

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Jan 16, 2012
 preparation of 20% dextrose solution
by: Anonymous

how to prepare 20% dextrose solution
Jan 03, 2012
 Answer
by: Anonymous

I think this is right. The initial concentrate times the initial volume = Final concentrate times the final volume

Ci x Vi = Cf x Vf

So: (.70 x 100ml) + (.90 x 100ml) = Cf x 200ml

70 + 90 = 200Cf
160 = 200Cf
Cf= .80
Concentrate final is 80%

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