Equivalent Weight Calculator is a free online tool that displays the equivalent weight for the given molecular weight and valency value of a chemical reaction. BYJU’S online equivalent weight calculator tool performs the calculation faster, and it displays the equivalent weight in a fraction of seconds.
How to Use the Equivalent Weight Calculator?
The procedure to use the equivalent weight calculator is as follows:
Step 1: Enter the molecular weight, valency value, and x for the unknown in the input field
Step 2: Now click the button “Calculate x” to get the result
Step 3: Finally, the equivalent weight value will be displayed in the output field
What is Meant by Equivalent Weight?
In chemistry, the equivalent weight of a chemical solution is defined as the ratio of the molecular weight of the solute to the valency of the solute. The equivalent weight of the substance will vary, and it depends on the types of reactions it undergoes. It is generally used to predict the mass of the substance which reacts with the one atom of hydrogen in the acid-base analysis. Also, the normality of the solution can be calculated using the equivalent weight. It means that the normality of the chemical solution is defined as the number of the equivalent weight of any substance dissolved in the one litre of solution. The formula to calculate the equivalent weight is given as:
Equivalent Weight = Molecular weight/ Valency
For example, consider the reaction,
H3PO4 → HPO42- + 2H+
The molecular weight of a chemical reaction is 98, and the valency is 2, then the equivalent weight of H3PO4 is
Equivalent weight = 98/2
Equivalent weight = 49
Therefore, the equivalent weight of H3PO4 is 49.