Question

Number of oxalic acid molecules in $100\, mL$ of $0.02\, N$ oxalic acid are

• A. $6.023 \times 10^{20}$
• B. $6.023 \times 10^{21}$
• C. $6.023 \times 10^{22}$
• D. $6.023 \times 10^{23}$

Hint:

`No. of molecules in one molar solution =6.02×10²³

Answer 1

The Correct Option is A

The correct answer is Option A) \(6.023 \times 10^{20}\)

To solve this problem first the molarity needs to be determined by the formula: Molarity=Valency factor/Normality​

Here, the Valency factor is 0.02 and the Normality is 2

Therefore, Molarity = 0.02/2 = 0.01M

Now, there's Avogadro number of molecules present in one molar solution = 6.023 × 10²³

So, the number of oxalic acid molecules in 100 mL of 0.02 N oxalic acid solution will be 

(0.01×6.023×10²³​×100) / 1000 =6.023×10²⁰.

Discover More Topics From Chapter: Molarity

 

Answer 2

The correct answer is Option A) \(6.023 \times 10^{20}\)

Real Life Applications

• Oxalic Acid in Hospitals: Pharmaceutical businesses employ acid to purify and dilute compounds in the medical field. Oxalic acid is not fatal in its unprocessed state. The body still may be harmed by the acid.
• Oxalic acid is used in industry for systems that process minerals. Oxalic acid can also be used to disinfect tools. It is utilised by those in the textile sector to bleach clothing.
• Oxalic acid is used as a cleaning agent to remove even the most stubborn grime. Metals may also be cleaned of spots and corrosion using it. Oxalic acid is also excellent for treating aged wood and polishing stone.

Other Applications for Oxalic Acid: The following are some of oxalic acid's other uses: 

• Film for photographs contains it.
• Acid can be used to treat wastewater.
• Additionally used as a mordant in dyeing procedures is oxalic acid.
• It facilitates the removal of food, pen, or mustard stains.

Question can also be asked as

1. How many oxalic acid molecules are in 100 mL of 0.02 N oxalic acid solution?
2. What is the number of oxalic acid molecules in a 100 mL sample of 0.02 N oxalic acid?
3. Calculate the number of oxalic acid molecules in 100 mL of a 0.02 N oxalic acid solution.
4. Determine the number of oxalic acid molecules in 100 mL of a 0.02 N oxalic acid solution.

Answer 3

The correct answer is Option A) \(6.023 \times 10^{20}\)

The quantity of reactants or products dissolved in a liter 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 solvents and less solute.
• Knowing how many moles of solute are contained in a liter of solution is frequently useful, especially when the solutions are being used in chemical processes.

Normality = Molarity × Valence factor
∴ Molarity =Normality / Valence factor

Factors Affecting Molarity

1. It has to be diluted with the solvent, which alters its volume, to create a concentrated solution. A solution's molarity also changes as it is diluted from V₁ to V₂. The equation below displays the modifications. M₁V₁ = M₂V₂

• M₁ = The solution's initial molarity.
• V₁ refers to the volume being transported.
• M₂ = Solution Final Concentration.
• V₂ = Final Solution Total Volume

     2. A change in temperature will often have an impact on a substance's volume. Since molarity depends on the volume of the solution, the temperature has an impact on it.

Relationship Between Normality and Molarity

Although normality and molarity are two distinct concepts, there are certain points when they are related. 

• While Molarity is defined as the solution's molar concentration.
• Normality is thought to be the solution's equivalent concentration.

Normality = Molarity × Molar Mass / Equivalent Mass

The formula described below can be used to calculate an acid's normality. 

Normality = Molarity × Basicity

Normality = Molarity / Acidity

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Related Topics
Difference between molarity and molality	Mole fraction	Number of Moles formula