Posted by **SHAKAYLA** on Monday, July 26, 2010 at 1:34pm.

How many grams of water must be added to 2 grams of a 65% iodine solution in order to produce a 42% iodine solution? Round your answer to the nearest tenth

- 9th grade science? math? -
**Ms. Sue**, Monday, July 26, 2010 at 1:53pm
After this, please type your school subject in the appropriate box.

- 9th grade -
**bobpursley**, Monday, July 26, 2010 at 4:40pm
You want to add M grams of water to 2 grams of .65 solution?

amount of iodine in final= amount of iodine in initial

.42(M+2)=.65(2)

solve for M.

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