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12 January, 01:43

A chemist has one solution that is 25% salt and 75% water and another solution that is only 5% salt. How many milliliters of each should the chemist use to make 1400 ml of a solution that is 10% salt.

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  1. 12 January, 01:53
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    10% of 1400 milliliters is 140 milliliters, so 140 milliliters is Salt
  2. 12 January, 02:12
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    Let x = number if mL of the first solution. 1400-x = number of mL of second solution.

    Equation: (1/4) x + (1/20) (1400-x) = 140

    (1/4) x + 70 - (1/20) x = 140

    (4/20) x = 70

    (1/5) x = 70

    x = 350

    350 mL of first

    1050 mL of second
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