ou choose to make a serial dilution of alcohols ie. to make the 2nd dilution from the 1st.  In order to end up with 128mL of 61% AND 52mL of 44%, how many mL of absolute ethanol do you need to make up the 1st solution? (answers to 2 d.p.)

4. A solution is 40% alcohol. How much pure alcohol must be added to 200 ml of the solution to make it 50% alcohol?

In the lab, Teresa has two solutions that contain alcohol and is mixing them with each other. Solution A is 2% alcohol and Solution B is 6% alcohol. She uses 600 milliliters of Solution A. How many milliliters of Solution B does she use, if the resulting mixture is a 3% alcohol solution?NumberofmillilitersofSolutionB:

A 528. mL solution was made by mixing 91.7 mL of ethanol, which has a density of 0.79 /gmL, and 431. mL of water, which has a density of 1.0 /gmL.Calculate the volume percent of ethanol in this solution.Be sure your answer has the right number of significant digits.

You have 220mL of a 10% solution (w/v). You need to prepare a 1:200 solution. Howmuch diluent will you add to the stock solution?

What is the mass percent of ethyl alcohol in a solution containing 62 mL of ethyl alcohol mixed into 200 mL of water?  (Note: Density of ethyl alcohol = 0.8 g/mL; density of water = 1 g/mL.)