SOLUTION: You have been asked to mix up some 70% isopropyl alcohol solution. You have 95% isopropyl alcohol solution on hand. How much do you have to add to 750 mL of pure water to created a

Question 626531: You have been asked to mix up some 70% isopropyl alcohol solution. You have 95% isopropyl alcohol solution on hand. How much do you have to add to 750 mL of pure water to created a 70% solution?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
You have been asked to mix up some 70% isopropyl alcohol solution. You have 95% isopropyl alcohol solution on hand. How much do you have to add to 750 mL of pure water to created a 70% solution?
-------
Equation:
iso + iso = iso
0.95x + 0*750 = 0.70(x+750)
---
Multiply thru by 100 to get:
95x + 0 = 70x + 70*750
25x = 70*750
x = 70*30
x = 2100 mL (amt. of 95% iso to be added)
=============================================
Cheers,
Stan H.
==================

RELATED QUESTIONS
how much water and 70% isopropyl alcohol solution must be mixed together to get 14 liters (answered by richwmiller)

Biology students at Salem College are preparing a solution of isopropyl alcohol to use in (answered by josgarithmetic,greenestamps)

JEN HAS A SOLUTION THAT IS 55% ISOPROPYL ALCOHOL AND A SOLUTION THAT IS 20% ISOPROPYL... (answered by Alan3354)

I'm making a cleaning solution requiring 2% alcohol, my isopropyl alcohol is 70% how... (answered by Alan3354)

You need a 90% alcohol solution. On hand, you have a 60 mL of a 20% alcohol mixture. You... (answered by nerdybill)

You need a 80% alcohol solution. On hand, you have a 225 mL of a 15% alcohol mixture. You (answered by josmiceli,mananth)

You need 390 mL of a 80% alcohol solution. On hand, you have a 70% alcohol mixture. How... (answered by richwmiller)

You need 150 mL of a 85% alcohol solution. On hand, you have a 70% alcohol mixture and a... (answered by Alan3354)

How many mililiters of 70% isopropyl alcohol should be mixed with 20 mililiters of water... (answered by jorel1380)