Question

How many grams of NaCl are needed to prepare 250g of a 10% (by mass) NaCl solution?​

Answer 1

Answer:

Hope it helps :)

Explanation:

To prepare a 10%(w/w) NaCl solution, mass out 10 g NaCl and place it in a 100-mL volumetric flask. Add about 80 mL of water to the flask. Once the NaCl has dissolved, add more water up to the 100-mL mark. If you don't have a volumetric flask, you can use a 100-mL graduated cylinder, but it won't be as accurate.