14 posts • Page 1 of 1
Molarity is basically the measure of the concentration of a solution in moles of a solute (which is the substance being dissolved) over the liters of solution (which is the substance the solute is being dissolved in). Something helpful about molarity is that if it is given, it can be used to find unknown amounts of solvent or solute.
Molarity is a measure of the concentration of a chemical species in a solution. It is telling you how many moles of a chemical species there are in a single liter of solution. It can be used to find many different values in relation to a chemical reaction if it is done in a solution.
Molarity is also important for dilution problems because it can be used in the equation (Minitial)(Vinitial)=(Mfinal)(Vfinal) to determine concentrations, volumes, or moles of the solute before or after the solution has been diluted.
With regards to molarity when diluting a solution, it is important to remember that the moles of solute remain the same. The unknown volume or mass can be computed by plugging known values into: M(initial)xV(initial) = M(final)xV(final)
Molarity's importance lies in how it defines the concentration of the solution and acting as a measurement of moles of solute per liter of solution. It is a big part of dilution calculations since moles of solute stay the same, so it is easy to calculate the molarity when knowing how much solution was added.
Most of the time in chemistry, you will be using moles to compare two elements, compounds, or solutions. Considering this, the M1V1 = M2V2 comes from. Molarity = moles/volume so you are comparing the moles in the form of Molarity1*Volume1 = Molarity2*Volume2
Who is online
Users browsing this forum: No registered users and 1 guest