Ok here is the question:
You weigh out pure NaH2PO4.
Weight of Sodium Dihydrogen phosphate use: 0.4756g
This is dissolved, quantitatively transfered and diluted to 100ml in volumetric flask. 10ml of this is pipetted and again diluted to 100.00ml to make the original phosphate standard.
Calculate:
The Phosphate concentration of this solution in mM
I not sure how to start it. Frist i converted 0.4756 g to 475.6mg. What do i do next. DO i divide the MW of sodium dihydrogen phosphate to get the millimoles of solute?