Question

How many grams of water must be added to 3 grams of a 35% iodine solution in order to produce a 16% iodine solution?
Round your answer to the nearest tenth.
3.6 g
2.8 g
3.2 g
4.3 g

Answer 1

C

Answer 2

3(.35 - .16)/(0-.16) ; if its negative just ignore the sign ... and dbl chk it

Answer 3

that gets me: 3.5625, but you still should dbl chk

Answer 4

3.5625(0) + 3(.35) ?= 6.5625(.16)

1.05 ?= 1.05