What is the definition of molarity?
1. The definition of molarity is the number of moles of solute dissolved per dm3 of the solution.
OR
2. Another definition of molarity is the substance per unit volume of solution.
3. Molarity is also known as the
• amount concentration
• molar concentration
• substance concentration
•
o It is represented as 1 M.
Formula of Molarity
The formula of molarity is given below:
Calculating molarity:
It can be calculated by the given equation, that is the ratio of the moles of solute whose molarity is to be calculated and the volume of solvent is used to dissolve the given solute.
Unit of Molarity
•
o According to the International System of Units (SI) , the unit of Molarity is mol/m3.
• But SI unit is not applicable for laboratory purposes and most of the chemical literature uses traditional unit that is mol/dm3
•
o or mol/L.
•
o This traditional unit is mostly designated as the letter M.
• But in SI prefix mega is used for sub multiples.
mol/m3 = 10-3 mol/dm3 = 10-3 mol/L = 10-3 M = 1mmol/L = 1mM
The units of milimolar and micromolar are designated as mM (10-3 mol/L ) and µM (10-6 mol/L ) respectively.
FAQ?
What is the relationship between molarity and molality?
Their relationship is mentioned below:
Where,
d=the density(g/ml)
m1=the molar mass of the solute
M=molarity
m=molality
What is the principle of molarity?
The main principle of molarity is that mole of solute and volume of solution is used . The solute is that substance of a solution which is dissolved in solvent component. A solvent is that component of a solution that dissolves the solute.
Does molarity depend upon the temperature?
Yes, molarity depends upon the temperature factor because volume of solution depends on temperature . As a result , molarity is also temperature dependent.
What increases molarity?
Molarity is inversely proportional to the volume of solution. So, if volume of a solution increases ,the molarity decreases and vice versa.
What is the difference between molarity and Molality?
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