In order to dilute 1L of 6M solution of NaOH to .5M solution, how much water must be added?

Answer 1

mL x M = mL x M

1000 mL x 6M = mL x 0.5M
Solve for mL which gives th TOTAL volume needed.

Answer 2

its actually the other way around, u need to figure out what volume u need of the .5M, e.g., if u want to make 500ml of it then u wud use c1vi=c2v2
so .5L X .5M = xL X 6M
making xL subject of the formula u wud then have the volume of ^M NaOH u wud need to put in 500ml to get a .5M solution