Question

How many grams of NaCl would you need to make 500 ml of a 100 mM solution? the atomic weight of NaCl is 35.
I was not given a way to solve this by my teacher.

Answer 1

I would convert 100 mM to M and mL to L. Then, how many mols do you need? That's mol = M x L = ?
Next step is grams = mols NaCl x molar mass NaCl = ?