Sodium chloride was dissolved in water to produce a 1.5M solution. Explain what this concentration tells us about the NaCl solution. How might a chemist use this ratio?

Question

Sodium chloride was dissolved in water to produce a 1.5M solution. Explain what this concentration tells us about the NaCl solution. How might a chemist use this ratio?

Answer 1

It tells us that for every liter of solution, you have 1.5 moles of NaCl.

Since the molar mass of NaCl = 58.4 g/mol, we also know that each liter of solution contains 1.5 x 58.4 = 87.6 grams of NaCl.

From this information, a chemist can determine how many mls of this solution must be used for any given mass of NaCl, or how much volume is needed for any given number of moles of NaCl. So, in summary, the chemist can calculate a volume of solution needed to provided a given mass, or from a given mass, the chemist can calculate the volume needed.