Ask Question
14 May, 15:29

You need a 70% alcohol solution. On hand, you have a 840 mL of a 95% alcohol mixture. How much pure water will you need to add to obtain the desired solution?

___mL of pure water to obtain

___mL of the desired 70% solution.

+3
Answers (1)
  1. 14 May, 15:59
    0
    Step-by-step explanation:

    If x is the volume of pure water:

    Initial + added = final

    0.95 (840) + 0 (x) = 0.70 (840 + x)

    798 = 588 + 0.70 x

    x = 300

    840 + x = 1140

    You need to add 300 mL of pure water to obtain 1140 mL of the desired 70% solution.
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “You need a 70% alcohol solution. On hand, you have a 840 mL of a 95% alcohol mixture. How much pure water will you need to add to obtain ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers