[michaelt817]

What mass (in grams) of a .500 m solution of sodium acetate CH3CO2Na, in water would you use to obtain .150 mol of sodium acetate?
I can't seem to think this one through. Not sure where to start. I've converted sodium acetate to mass but not sure if im heading in the right direction.

[Borek]

Obviously you have to dilute - that is, mix your 0.5 molal solution with pure water. Assume you want to prepare 1kg of solution - how many moles/what mass of acetate will it contain? How much water? Now, how much of the 0.5 molal solution contains the same amount of acetate?