Enter the molar mass (g/mol) and the number of hydroxyl groups into the Equivalent Mass Calculator. The calculator will evaluate and display the Equivalent Mass.
Equivalent Mass Formula
The following formula is used to calculate the Equivalent Mass.
Meq = MM / HG
- Where Meq is the Equivalent Mass (g/mol/group)
- MM is the molar mass (g/mol)
- HG is the number of hydroxyl groups
To calculate the equivalent mass, divide the molar mass by the number of hydroxyl groups.
How to Calculate Equivalent Mass?
The following example problems outline how to calculate Equivalent Mass.
Example Problem #1:
- First, determine the molar mass (g/mol).
- The molar mass (g/mol) is given as: 15.
- Next, determine the number of hydroxyl groups.
- The number of hydroxyl groups is provided as: 6.
- Finally, calculate the Equivalent Mass using the equation above:
Meq = MM / HG
The values given above are inserted into the equation below and the solution is calculated:
Meq = 15 / 6 = 2.5 (g/mol/group)
FAQ
What is molar mass and how is it determined?
Molar mass is the mass of one mole of a substance, usually measured in grams per mole (g/mol). It is determined by summing the atomic masses of all the atoms in a molecule of the substance. For elements, the molar mass is the atomic mass found on the periodic table. For compounds, it is the sum of the atomic masses of all the atoms in the compound’s formula.
Why is the number of hydroxyl groups important in calculating equivalent mass?
The number of hydroxyl groups in a molecule is important because the equivalent mass calculation specifically requires dividing the molar mass by the number of these groups. This is because the equivalent mass is a measure of how much of a substance reacts with or replaces another substance, and hydroxyl groups often play a key role in such chemical reactions.
Can the Equivalent Mass Calculator be used for compounds without hydroxyl groups?
While the Equivalent Mass Calculator as described is designed for use with compounds that contain hydroxyl groups, the concept of equivalent mass can apply to other types of compounds as well. However, the calculation might need to be adjusted based on the specific type of reaction or chemical interaction the compound is involved in. For compounds without hydroxyl groups, the relevant reactive group or atom count would replace the hydroxyl group count in the formula.
