how many milliliters of 5% hydrochloric acid solution should be added to 60 milliliters of a 10% hydrochloric acid solution to obtain an 8% solution

Question

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Answer 1

how many milliliters of 5% hydrochloric acid solution should be added to 60 milliliters of a 10% hydrochloric acid solution to obtain an 8% solution

xmL(5) + 60 mL(10) = (x + 60)(8)

 

5x + 600 = 8x + 480

3x = 120

x = 40mL