How to prepare 50.0mL of 2.30 X 10^-2M solution of Lasix
1) Look up the molar mass of Lasix by Googling "Lasix". Follow the link to Wikipedia. It turns out this is the brand name for Furosemide.
molar mass = 330.745 g/mol
2) Mass of Lasix = (0.0500 L) (2.30 x 10-2 mol/L) (330.745 g/mol) = 0.380 g
3) Weigh the correct mass above on an analytical balance. If your balance has 0.1 mg precision, weigh out 0.3804 g Lasix.
4) Add this to a 50 mL volumetric flask.
5) Add deionized water up to the fill mark.
6) Cap it, and invert multiple times. The solution is ready.
(2.0 mL) (0.03 g/mL) = 60. mg
A s you know that molarity = moles / volume in L
moles = Molarity * Vol in L
get the moles here and convert these moles in gram by suing
moles = mass / molar mass
mass required to dissolve in 50 mL = moles * molar mass ...
Thank you so much. Was really stuck on this question.