[Ham-Computers] Need information.

[Rolly NF7B c]

Ken

Here is the math;


Starting out with 1 part of solution at 35% concentration



1        part of Solution contains

0.35    parts of h2o2

0.65    Parts of water



3.00%        Desired new % solution



A) Divide the # parts oh h2o2 by the desired new % of 3% to determine the

     the # parts total of solution at the desired New %



 = 1 / 0.03 = 11.66667 = parts of solution



B) Subtract the # parts of h2o2 from the # parts total of solution to 
determine

     the total # parts of water in the desired percentage solution



= 11.66667 - 0.35 = 11.31667 = the total # parts of water in the desired 
percentage solution



C) Subtract Starting # parts or water from the total # parts of water to 
determine

      the total # of parts of water to be added.



 = 11.31667 -0.65 = 10.66667 or 10 2/3=the total # of parts of water to be 
added for each part of the original 35 % solution.



Might want to use 11 to be safe.





Repeating the procedure at desired new % at 8 %



A) = 1 / .08 = 4.375 = the # parts total of solution at the desired New %



B) = 4.375 - 0.35 = 4.025 = the total # parts of water in the desired 
percentage solution



C) = 4.025 -0.65 = 3.375 or 3 3/8 = the total # of parts of water to be 
added.



Might want to use 3.5 to be safe.

I hope this is helpful.

Rolly NF7B


-----Original Message----- 
From: Ken
Sent: Monday, December 26, 2011 5:42 AM
To: boatanchors at mailman.qth.net ; boatanchors at theporch.com ; 
ham-computers at mailman.qth.net
Subject: [Ham-Computers] Need information.

Hi Folks,
Please excuse but I desperately need information. My math ain't what it used 
to be!

Can someone tell me how to mix 35% solution with clean water to get a 3% 
solution.
I bought a quantity of "food grade 35% solution  h2o2 and need the 3% 
solution.
While at it, how about a 35% solution down to an 8% solution for agricultral 
purposes?
My heartfelt thanks. My math never was anything to brag about and far worse 
now tho I am only 94 years of age!

Ken  N5CM




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