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A scientist mixes water (containing no salt) with a solution that contains 40% salt. She wants to obtain 160 ounces of a mixture that is 35% salt. How many ounces of water and how many ounces of the 40% salt solution should she use?

Respuesta :

karina3290
The balance equation for the salt mass is

0.3*(210-W) = 0.15*210.

Simplify and solve for W:

63 - 0.3W = 31.5,

63 - 31.5 = 0.3W,

0.3W = 31.5,

W = 31.5%2F0.3 = 105.

Answer. 105 ounces of water is needed.

I hope this helps :)

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