SOLUTION: Suppose a chemistry student can obtain two acid solutions from the stock room. The first solution is 20% acid and second solution is 45% acid. How many millimeters of each solution

Question 605325: Suppose a chemistry student can obtain two acid solutions from the stock room. The first solution is 20% acid and second solution is 45% acid. How many millimeters of each solution should the student mix together to obtain 100 millimeters of 30% acid solution?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Suppose a chemistry student can obtain two acid solutions from the stock room. The first solution is 20% acid and second solution is 45% acid. How many millimeters of each solution should the student mix together to obtain 100 millimeters of 30% acid solution?
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Equation:
acid + acid = acid
0.20x + 0.45(100-x) = 0.30*100
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20x + 45*100 - 45x = 30*100
-25x = -15*100
x = 60 ml (amt of 20% solution needed)
100-x = 40 ml (amt of 45% solution needed)
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Cheers,
Stan H.
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