Calculate the molarity of a solution in which 0.75 moles of a solute are dissolved in 125g of solution (density of solution = 1.05g/mL).
I don't even know where to begin.
Start with the definition.
Molarity=molesSolute/volumeSolution
and VolumeSolution=masssolution/density.
You will have to change the volume from ml to Liters.
1.05 * 1L/1000mL = 0.001 L
So, do I then go ahead and do this:
Vsolution = 125g/0.001 L ?
To calculate the molarity of a solution, you need to know the number of moles of solute and the volume of the solution. In this case, you have the number of moles of solute (0.75 moles), but you need to find the volume of the solution.
To find the volume, you can use the density of the solution. The formula for density is:
Density = Mass/Volume
Given that the mass of the solution is 125g and the density is 1.05g/mL, you can rearrange the formula to solve for volume:
Volume = Mass/Density
Volume = 125g / 1.05g/mL
Volume = 119.05 mL
Now that you have the volume of the solution (119.05 mL or 0.11905 L) and the number of moles of solute (0.75 moles), you can calculate the molarity.
Molarity (M) = Moles of Solute / Volume of Solution (in liters)
Molarity = 0.75 moles / 0.11905 L
Molarity ≈ 6.299 M
Therefore, the molarity of the solution is approximately 6.299 M.