Lesson 52

Chemical Mixture Problems

(type A)

Chemical Mixture Problems

• these will have some amount of water, mixed with some other chemical (iodine, alcohol, antifreeze, etc.)

• equations can be written like:– water poured in + water dumped in = water total– iodine poured in + iodine dumped in = iodine total

Example 52.1• A druggist has one solution that is 10% iodine

and another that is 50% iodine. How much of each should the druggist use to get 100 mL of a mixture that is 20% iodine?

DnPn

20%

10%50%

Example 52.2

• A chemist has one solution that is 10% salt and 90% water and another solution that is only 2% salt. How many milliliters of each should the chemist use to make 1400 mL of a solution that is 6% salt?

Example 52.3

• A chemist has one solution that is 25% salt and 75% water and another solution that is only 5% salt. How many milliliters of each should the chemist use to make 1600 mL of a solution that is 15% salt?

Homework

• P.S. 52

• 2 - 30 even