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Calculate how much 10% acid solution and how much pure acid must be mixed to end up with exactly 12 liters of 30% acid solution.

 Aug 5, 2020
 #1
avatar+27001 
+1

12 liters final

 

x = 10%

12-x = 100% solution

 

.1 x   +   1 (12-x)   ==  .3 (12)

.1x + 12 - x = 3.6

.9x =8.4

x = 9 1/3   liters of 10%

 Aug 5, 2020
 #2
avatar+169 
+1

So we have 12 liters in the end. 

First, we can set acid percentage to 10%

a=.1

And we also have 12-a as the full solution at 100%

Soo..

.1a+12-x=.3(12)

solve the rest 

:D

 Aug 6, 2020

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