The mass of sodium is 22 and of chloride is 35.?

Question

How would you make a one molar solution? How about a 100mM solution?

Answer 1

A 1 molar solution is a solution in which 1 mole of a compound is dissolved in a total volume of 1 litre. 1 mole equals one gram x molecular weight.

So a one molar solution of NaCl is 57gm per litre pure water (Actually the molecular weight of NaCl is 58.44 but thats incidental)

100mM is 10 times diluted i.e. 5.7gm per litre

Answer 2

Assumong the masses you've given are correct, then the molar mass of sodium chloride is 57 g/mol. In other words, one mole of NaCl weighs 57 grams. So to make a liter of 1M (that's 1 mole of solute per liter of SOLUTION, not solvent) solution, you would start by putting a hundred mL or so of distilled water in a 1000 mL flask. Then add 57 grams of NaCl and stir until it dissolves. Finally, fill the flask to the 1000 mL mark.

To make a 100 mM solution, you do the exact same thing only you add 5.7 grams of NaCl.

(If you add all the water first, you'll end up with slightly over a liter of solution due to the mass of the salt. If you add all the water before the salt is dissolved, the volume may change slightly when it does dissolve.)

Answer 3

The mass of sodium is 22.9. It is rounded off to 23 unless you are taking quantitative chemistry. That is unless you know that you have the isotope of Na that weighs 22. Chlorine is 35.5.
You did not say if it is a 1 molar solution of NaCl that you are making. If so then you weigh out 58 grams of NaCl and dissolve it in 1 liter of distilled water.

Answer 4

Add one mol....to 1 liter of water.