How much NaCl (mol. wt. 58.5 g/mol) would be needed to make a 10% solution of NaCl in a final volume of 1 liter of water?

Answer 1

To make a 10% solution of NaCl with a final volume of 1 liter, we need to determine how much NaCl is needed.

A 10% solution means that 10 grams of NaCl is dissolved in 100 mL of water. However, to simplify calculations, we will convert 10% into a decimal form: 10/100 = 0.1.

Since the final volume is 1 liter (1000 mL), we need to calculate 10% of 1000 mL:

0.1 * 1000 mL = 100 mL

Therefore, we need 100 mL of NaCl solution, which contains 10 grams of NaCl, for a final volume of 1 liter.

To convert 100 mL into grams, we use the fact that the density of water is approximately 1 g/mL (at room temperature):

100 mL * 1 g/mL = 100 grams

So, we need 100 grams of NaCl to make a 10% solution in a final volume of 1 liter of water.