mixing solutions problem by April (MI, USA) How much 75% ethanol is needed to make 300ml of 30% ethanol?A. 80mLB. 120mLC. 180mLD. 240mLWould really appreciate it if someone could help me out by writing out the problem (show how to solve). Thank you Comments for mixing solutions problem Click here to add your own comments Jan 18, 2012 alcohol by: Anonymous want-----X qty= solutionhave30%---- X 300 ml= 120 ml75% Jan 10, 2012 simple by: Riduan You can do both ways; 75%- - - 30 30% 0%- - - 45Now, the next step:30/75.300=120 mlor (C1)(V1) = (C2) (V2) (.30)(300) = (.75) (X) 90 /.75 = 120 ml Oct 27, 2011 Pharmacy Math Solutions by: Anonymous Calculate how much mixture or solution must be given so that the patient receives the correct dose of active ingredient.Requires 50mg of active ingredient using a 5% w/w mixture Jul 27, 2011 there is a short cut by: Anonymous Times the two that are close together and divide by the one that is far away! Jun 29, 2011 mixing solutions problem by: Anonymous How much 75% ethanol is needed to make 300ml of 30% ethanol?A. 80mLB. 120mLC. 180mLD. 240mLC1 x V1 = C2 x V230% x 300mL = 75% x 9000 = 75x 9000/75 = x 120mL = xanswer B. Click here to add your own comments Join in and write your own page! It's easy to do. How? Simply click here to return to Ask a Math Question privacy
