How can I measure the concentration of salt in water?
Molarity = moles salt/liters solution
Molality = moles salt/kg solution
Please note that a solution which is 1M (1 molar) will be slightly more concentrated than a solution which is
This is because 1Lof 1M solution contains 1 mole NaCl dissolved to make 1L of salt water solution. The 1L will be mostly water but a small volume is taken up by the salt. The the volume of the water will be slightly less than 1L.
In 1L of a
Here are two videos I've made which should be helpful.