Precalculus Enhanced with Graphing Utilities
Precalculus Enhanced with Graphing Utilities
6th Edition
ISBN: 9780321795465
Author: Michael Sullivan, Michael III Sullivan
Publisher: PEARSON
Question
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Chapter A.8, Problem 41AYU
To determine

To find: How much water must be evaporated?

Expert Solution & Answer
Check Mark

Answer to Problem 41AYU

Evaporate 10.66 ounces of water.

Explanation of Solution

Given:

How much water must be evaporated from 32 ounces of a 4% salt solution to make a 6% salt solution?

Calculation:

Let x = amount of water that must evaporate.

Now we know that the amount of pure salt in the original solution ( 0.04 )( 32 ) has equal the amount of pure salt in the final solution after evaporation has taken place ( 0.06( 32  x ) ) .

So, ( 0.04 )( 32 ) = ( 0.06( 32  x ) ) .

1.28 = 1.92  0.06x

0.64 = 0.06x

x = 10.6667

Therefore evaporate 10.66 ounces of water.

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