Equivalent Weight

What is equivalent weight?

Equivalent weight is the mass of a substance that combines with or is equivalent to eight grams of oxygen or one gram of hydrogen in a chemical reaction.

How is equivalent weight calculated?

It is calculated by dividing the molecular weight by the valence (number of electrons transferred per molecule in the reaction).

What is the relationship between equivalent weight and molarity?

Equivalent weight helps in converting molarity to normality by accounting for the number of ions participating in a reaction.

When is equivalent weight used in calculations?

It is used in titration calculations and in determining the concentrations of solutions in acid-base reactions.

Why is equivalent weight important in redox reactions?

It allows for the calculation of the exact amount of a substance needed to react with a given amount of another substance in redox reactions.

Can equivalent weight vary with the type of reaction?

Yes, the equivalent weight of a substance can vary depending on the reaction it participates in due to different valences.

How does equivalent weight relate to normality?

Normality is the number of equivalents per liter of solution, and it directly uses the concept of equivalent weight for its calculation.

What is the difference between equivalent weight and molar mass?

Molar mass is the mass of one mole of a substance, while equivalent weight considers the mass that reacts with a fixed amount of another substance based on valence.

How do you calculate the equivalent weight of acid and base?

Divide the molar mass of the base by the quantity of hydroxyl groups to determine the equivalent mass of the base. Divide the molar mass of an acid by the number of protons to determine its equivalent weight.

What is the equivalent concentration, and how to calculate it?

EW stands for equivalent weight in grams per equivalent. It is computed by dividing the solute’s molecular weight by its equivalents per mole. The amount of H+ ions that an acid contributes to a mole of acid determines how many equivalents are there for acids.

What does “equivalent concentration” mean?

The molar concentration of a solution (ci), is divided by an equivalency factor (f), to determine its equivalent concentration, or normalcy. Normality = cif

What are the factors on which the equivalent weight of any compound depends?

The equivalent weight of any compound depends upon the following two factors,

• Molecular weight 
• Valency factor

The most commonly used phrase in chemistry is “equivalent weight,” which is also one of the fundamental concepts in physical chemistry. Equivalent weight commonly referred to as a gram equivalent is the mass of one equivalent or the mass of a particular material that will combine with or replace a specific amount of another substance. To say it another way, the mass of a substance that can displace 1.008 grams of hydrogen or 8.0 grams of oxygen or 35.5 grams of chlorine is its gram equivalent or equivalent weight. Let us study the Equivalent Weight in detail in this article.