Posted by **:)** on Friday, March 2, 2007 at 6:21pm.

A chemist has 80 pints of a 20% iodine solution. How many pints of iodine must be added to produce a solution that is 33.1/3% iodine?

Please help me work this through

Let X be the number of pints of iodine that must be added.

You start out with a mix that contains 16 pints of pure iodine and 64 of solvent. You keep the amount of solvent the same and add X pints of iodine. The new fraction of iodine is

(16 + X)/(80 + X) = 1/3

16 + X = 80/3 + X/3

(2X/3) = 32/3

X = ?

## Answer this Question

## Related Questions

- Chemistry - when 7.50 grams of iodine (I2) is added to 48.7grams of carbon ...
- 9th grade - How many grams of water must be added to 2 grams of a 65% iodine ...
- Chemistry - A solution of iodine (I2) in carbon tetra-chloride(CCl4) is used ...
- Math - A chemist working on a flu vaccine needs to mix a 10% sodium-iodine ...
- chemistry - When 7.50 grams of iodine (I2) is added to 48.7 grams of carbon ...
- algebra - A pharmacist has 40% and 60% iodine solutions on hand. How many ...
- Chemistry - A student has 100.0 mL of an unknown solution of Vitamin C. She ...
- Chemistry - A student has 100.0 mL of an unknown solution of Vitamin C. She ...
- Chemistry - Iodine pentafluoride is an incendiary agent, a substance that ...
- Chemistry - A student has 100.0 mL of an unknown solution of Vitamin C. She ...