MCQ Detailed View

Volume strength is a measure of the oxidizing power of hydrogen peroxide (H₂O₂) and represents the number of liters of oxygen gas (O₂) released from 1 liter of solution under standard conditions. There is a direct relationship between the normality (N) of H₂O₂ and its volume strength (V), given by the formula:

Volume Strength = 11.2 × Normality

For a 1.5 N H₂O₂ solution, the calculation is:

Volume Strength = 11.2 × 1.5 = 16.8 / 2 ≈ 8.4

This calculation shows that 1 liter of a 1.5 N hydrogen peroxide solution can release 8.4 liters of oxygen gas under ideal conditions. The factor 11.2 comes from the molar volume of oxygen at standard temperature and pressure (STP).

Hydrogen peroxide is widely used as an oxidizing agent, disinfectant, and bleaching agent, and its volume strength indicates the amount of oxygen it can release. Understanding the relationship between normality, molarity, and volume strength is crucial for laboratory calculations, chemical reactions, and industrial applications.

The concept also helps students understand stoichiometry in redox reactions and how solution strength affects chemical reactivity. For example, higher normality solutions have higher volume strength, meaning they release more oxygen and have stronger oxidizing power.

Volume strength is a standard way of expressing H₂O₂ concentration in laboratory and industrial settings, making it a key concept in physical chemistry and practical applications.