Percent Mixture Problems

Julie Martinez Katherynne PerezDanielle Chagolla

Objective/ Do Now:OBJECTIVE: I will be able to master standard 15.0 by at least solving 3 practice problems with 80% accuracy.

Do Now: Solve the following Percent Mixture Problem-

How many liters of a 70% alcohol solution must be added to 50 liters of a 40% alcohol solution to produce a 50% alcohol solution?

Vocabulary

Percent: One part in every hundred

Mixture: A substance made by mixing other substances together

Percent Mixture: Are chemistry problems involving unit cancellation.

Percent Mixture Problems Notes

How do I solve I percent mixture problem?

Step: 1~ First you create your 4x4 table

Amount of Percent that Amount that Mixture meets criteria meets (decimal) criteria

FirstAmount

Second Amount

Total Amount

Step: 2~ Fill in your 4x4 table with as much information given from the problem.

Percent Mixture Problem (cont.)Step: 3~ Once you have filled in the box with the information you needed you start to multiply the “Amount of Mixture” with the “ Percent that meets criteria as decimal” to get your Amount that meets criteria.

Step:4 ~ You make you equation(first amount) + (second amount)= (third amount).

How To Solve a Percent Mixture Problem Visually

A 72% acid mixture is created by mixing 12pints of a 66% acid solution with 8 pints of another acid solution. Find the concentration of the other acid solution.Amount of Percent that Amount that

Mixture meets criteria meets *decimal* criteria

First Amount

SecondAmount

Total Amount

12 .66 12(.66)

8 x 8x

20 .72 20(.72)

12(.66) + 8x = 20(.72) 7.92+8x=14.40-7.92 -7.92 x= 0.81

8x= 6.48

8x/8= 6.48/8x= 0.81

Guided Practice

1. A grocer mixes 2 L of a 34% apple juice beverage with 4 L of a 19%apple juice beverage. What is the percent concentration of apple juice in the resulting mixture?

2. A 63% acid solution is created by mixing 3 liters of an 87% acid solution with 12 liters of another acid solution. Find the concentration of the other acid solution.

3. An allergist wants to mix some pure water with 2 ounces of an18% pollen serum to produce a serum that is 12% pollen. How many ounces of pure water should he use?

Guided Practice (cont.)

4. A restaurant mixes 5 liters of a 13% sugar liquid with some 21%sugar liquid. If the final mixture is 19% sugar, how many liters of the 21% sugar liquid were used?

5. An 18-gallon solution that is 45% vinegar is mixed with 9 gallons of another solution. The resulting solution is 58% vinegar. Find the percentage of vinegar in the other solution

6. What is the percent concentration of sand in a mixture a mason made by mixing 12 pounds of pure sand with 2 pounds of 72% sand cement?

Exit Slip!!!Directions: Please complete The two following problems in your workbook and show your work.

1. 5 fl. oz. of a 2% alcohol solution was mixed with 11 fl. Oz. of a 66% alcohol solution. Find the concentration of the new mixture

2. Emily mixed together 9 Gal. of brand a fruit drink and 8 gal. Of Brand B fruit drink, which contains 48% fruit juice. Find the percent of fruit juice in Brand A if the mixture contained 30% fruit juice.