Answer:
To calculate the molarity of a solution it is necessary to know
- Moles of solute, or mass
- Volume of solution
Step-by-step explanation:
Molarity means moles of solute, in 1L of solution.
If you firstly know the mass of solute, you can turn into moles like this:
Mass of solute / Molar mass of solute = Moles
Also, you should know the volume.
If those moles are in a certain volume, in 1L (or 1000 mL), how many moles, do you have. You should make a rule of three.
Molarity = moles / L
mmoles / mL