Question

Calculate Molarity of a 63% w/w $HNO_3$ solution if density is 5.4 g/mL :

• A. 14 M
• B. 12 M
• C. 10 M
• D. 8 M

Answer 1

The Correct Option is A

100 gm soln → 63 gm

HNO₃ 100/5.4mL → 1 mole HNO₃

So, Molarity = %W,WxDx10/M_solute = 63x5.4x10/63 = 54M

The quantity of reactants or products dissolved in a litre of solution is referred to as molarity. The term "molarity" is frequently used to describe the concentration of a solution.

Concentrated Solutions are those that contain more solute and less solvent.

Dilute solutions are those that include more solvent and less solute.

Knowing how many moles of solute are contained in a litre of solution is frequently useful, especially when the solutions are being used in chemical processes.

The amount of moles of solute present in a litre of solution is known as molarity.

By dividing the moles of solute by the volume of the solution, molarity is determined.

The letter 'M' stands for it.

Additionally known as Molar Concentration.

Molarity is expressed in terms of M, mol, or mol/L.

The unit symbol for molarity in the SI system is mol/L or mol/dm³.

Molarity Formula is given as follows: 

M = n/V

Where

M = Molarity of a particular solution

n = Number of moles of the solute

V = Volume of the solution

It can also be understood as 

Molarity = Number of moles of the solute/Volume of solution in liters

The following are some Molarity applications: 

For scientists and chemists who operate in many scientific domains, molarity is quite helpful.

When determining the concentration of solutions, it is crucial. 

Before beginning a chemical experiment, it is helpful to prepare chemical solutions and check the concentration of a particular solution. 

Molarity is also very beneficial for many laboratory procedures, such as the analysis of blood samples.

These are a few examples of how molarity is used in science.