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12 May, 07:06

Annabel has 25 ounces of a 20% boric acid solution which she wishes to dilute to a 10% solution. How much water does she have to add in order to obtain the 10% solution?

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  1. 12 May, 07:34
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    This can be solve by establish an equation

    let x be the amount of water to be added

    y is the amount of the 10 % soultion formed

    25 + x = y

    then the other equation will be

    25 (0.80) + x = 0.90y

    solving the equtions simultaneously

    x = 25 ounces of water is need to dilute the solution to 10 % boric acid
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