I cannot for the life of me figure this out:
What mass of Na2SO4 is needed to prepare 350.0 mL of a solution having a sodium ion concentration of 0.125M?
I know that there are 2 moles of Na for every 1 mole of SO4.
Now do I multiply that by 3, since there are 2 moles of Na & 1 mole of SO4?
I don't know when to use my volume.
Argggg.. any suggestions?
Thanks