posted by Anonymous .
how many grams of sodium chloride do you need to prepare 250 mL of a 5.00% sodium chloride solution?
5% means 5g NaCl in 100 g solution.
100 g has what volume?
mass = volume x density. If you know density you can calculate volume.
Then 5 g NaCl x (250 mL/volume) = xx g NaCl