SOLUTION: How much 20% HCI solution and 40% hci solution must be mixed together to make 400 millileters of 35% hci solution

Question 948838: How much 20% HCI solution and 40% hci solution must be mixed together to make 400 millileters of 35% hci solution
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
How much 20% HCI solution and 40% hci solution must be mixed together to make 400 millileters of 35% hci solution
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Equation:
acid + acid = acid
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0.20x + 0.40(400-x) = 0.35*400
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20x + 40*400 - 40x = 35*400
-20x = -5*400
x = (1/4)400
x = 100 ml (amt. of 20% solution needed)
400-x = 300 ml (amt. of 40% solution needed)
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Cheers,
Stan H.
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