Concentration Word ProblemMy husband made 1/2 gallon of orange juice by mixing two containers of water with one container of frozen juice concentrate. I like orange juice that is precisely 18%...

Concentration Word Problem

My husband made 1/2 gallon of orange juice by mixing two containers of water with one container of frozen juice concentrate. I like orange juice that is precisely 18% juice concentrate and 82% water. How many ounces of my husbands mixture and how much water should i use to create one cup of juice that I will like?

Asked on by hellome234

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jeew-m's profile pic

jeew-m | College Teacher | (Level 1) Educator Emeritus

Posted on

In the husbands mix you have 1/3 of the total volume as juice.So it has 1/3*100% = 33.33% of juice. So we need to add more water to lower the concentration to 18%.

At the moment;

Volume of the mix = 1/2 gal.

Volume % of juice = 33.33%

Let us consider the volume of a cup is 8 ounces(U.S. customary).

So in the final mix of your desire will have;

18/100*8 = 1.44 ounce of juice and 82/100*8 = 6.56 ounces of water.

For your mix juice only comes from the husbands mix. so 1.44 ounces comes from husbands mix. In that mix we have 33.33% of juice. So 33.33% represent 1.44 ounces.

The volume taken by husbands mix = 100/33.33*1.44 = 4.32 ounces.

From these 4.32 ounces 1.44 is juice and rest is water.

So the water from juice mix = 4.32-1.44 = 2.88

 

In your desired mix you have 6.56 of water. 2.88 comes from the juice mix and the rest is coming from the water you add separately.

The water added last = 6.56-2.88 = 3.68

 

So finally to make your dream cup of juice you need to add 4.32 ounces of juice mix from your husbands mixture and 3.68 ounces of water. 



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