Mathematics

Question

how many kilograms of pure water is to be added to 100 kilograms of a 30% saline solution to make it a 10% saline solution

1 Answer

  • Answer:

      200 kg

    Step-by-step explanation:

    If w is the amount of water added, then the concentration of the solution is ...

      salt/solute = 100(0.30)/(100 +w) = 0.10

      30 = 10 +0.10w . . . . . simplify

      20 = 0.10w . . . . . . . . subtract 10

      20/0.10 = w = 200 . . . . divide by 0.10

    200 kg of water must be added to dilute the solution to 10%.

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