Question

if you are given vegetables, a balance, and you are asked to find the molar concentration what would you do?

Answer 1

are you allowed to use anything else? eg. a sugar or salt solution?

Answer 2

oops sorry you are also given different molar amounts of sucrose solution.

Answer 3

In that case, you could weigh samples of the first vegetable, place them each in a different molar concentration of sucrose solution for a length of time, then remove them and weigh them again. Whichever concentration caused the least change in weight of the vegetable could be considered to be the approximate molarity of that vegetable, because it is the closest to isotonic to the vegetable. Solutions that are hypertonic to the vegetable (have a higher solute concentration) will cause a net diffusion of water out of the vegetable, causing it to lose weight and possibly shrivel. Solutions that are hypotonic to the vegetable (have a lower solute concentration) will cause a net diffusion of water into the vegetable, causing it to gain weight and possibly expand. Repeat for each different type of vegetable. :)