SOLUTION: A teacher needs 1 liter of a solution of 5% HCL for an experiment. He only has a stock solution of 99% HCL, how much water (0% acid) and how much stock solution (99%) of HCL must h

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Question 618773: A teacher needs 1 liter of a solution of 5% HCL for an experiment. He only has a stock solution of 99% HCL, how much water (0% acid) and how much stock solution (99%) of HCL must he mix to get 1 liter 5% solution?
Found 2 solutions by ewatrrr, richwmiller:
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi, Re TY, note: ALL info was put in terms of & each side of EQ has a total of 1 Liter of solution

how much  (0% acid)highlight%28x%29 and how much stock solution (99%) of HCL

must he mix to get 1 liter 5% HCL solution

     Water = water

+x+%2B+.01%281L-x%29+=+.95%2A1L 

      .99x = .94L

         x = .94L/.99 =.95L of water needs to be added

CHECKING our Answer***

   .95L + .01*.05 = .95L

Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
from view of water
x+y=1
.01x+1.0y=.95(x+y)
x=0.0505051, y=0.949495
from view of acid
x+y=1
.99x=.05(x+y)
x=0.0505051, y=0.949495