Find out how to prepare the following solutions gravimetrically. Be specific about precisely what equipment and glassware you would utilize when appropriate. Show calculations.
a. 100.0 mL of 0.500 mg/L sodium chloride from solid NaCl
b. 100.0 mL of 100 ppm Cu2+ stock solution from a standard solution that is 1,000 mg/L (note that all zeros are meant to be significant here)