Ashton F.

asked • 09/13/22# Mass Balance Diagram

I have a mass balance diagram where you're mixing sulfuric acid(40% concentrate) with sulfuric acid(90% concentrate) and it needs to be 250 lbm sulfuric acid with 98% concentrate. How do I do the equation to figure out the amount of strong and weak sulfuric acid I need?

## 1 Expert Answer

.98x + .4(250-x) = .9(250)

.98x -.4x = (.9-.4)250

.58x = .5(250) = 125

x = 125/.58 = about 215.5 = amount of 98%

250-215.5 = 34.5 = amount of 40%

check the answers

98-90=8

90-40 =50

50/8 = 25/4 = 6 1/4

you need 6 1/4 times as much 98% as 40%

215.5/34.5 = about 6 1/4

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William W.

Double check your question - you can't mix 40% with 90% and get 98% unless you boiled off the water or something09/13/22