Question

You are asked to make 500 mL of a 0. 250 M sodium chloride (NaCl) solution.

a. How many moles of NaCl would you need?


b. How many grams of NaCl would you need? (gfm = 58 g/mol)

Answer 1

a. .125 mol b. 7.25g

Step-by-step explanation:

a. To get the moles multiply the volume by the molarity.

.5L*.25M=.125mol NaCl

b. The molar mass is provided so multiply the moles by the molar mass to get the amount of grams of nacl.

.125mol*58molar mass=7.25g nacl to make the solution