Chemical Name
Generate the systematic name, formula, and molar mass of any ionic compound by selecting a cation and anion. Free online chemistry naming tool for students.
About This Calculator
The Chemical Name Calculator helps you quickly determine the systematic IUPAC name, chemical formula, and molar mass of binary ionic compounds and compounds containing polyatomic ions. Simply select a cation (positive ion) and an anion (negative ion) from the dropdown menus, and the calculator automatically balances the charges to produce the neutral compound. This tool is designed for chemistry students, educators, and professionals who need to convert between ion combinations and their corresponding compound names without memorizing naming conventions.
The naming follows standard IUPAC rules: the cation name is written first, followed by the anion name. For monatomic anions, the element name ending is replaced with the suffix "-ide" (e.g., chlorine becomes chloride). Transition metals with variable oxidation states include their charge as a Roman numeral in parentheses, such as Iron(III) for Fe3+. For compounds containing polyatomic ions like sulfate (SO42-) or ammonium (NH4+), the calculator uses the established names for these ion groups. The calculator also computes the molar mass by summing the atomic masses of all atoms in the compound, weighted by their stoichiometric coefficients, providing a complete elemental mass composition breakdown and chart.
Regional Notes
Chemical nomenclature follows IUPAC standards worldwide, so the naming rules are consistent across all regions. The molar mass values use atomic masses from the standard IUPAC periodic table of elements, which is universally accepted. Students in India (following CBSE/ICSE curricula), the United States (AP/IB Chemistry), and the United Kingdom (A-Level Chemistry) will find this calculator useful for homework, exam preparation, and laboratory work. Common ionic compounds like sodium chloride (NaCl), calcium carbonate (CaCO3), and ammonium sulfate ((NH4)2SO4) are used globally in industrial, educational, and research settings.
Frequently Asked Questions
How does the Chemical Name Calculator work?
The Chemical Name Calculator uses the standard rules for naming ionic compounds. Select a cation (positive ion) and an anion (negative ion), and the calculator determines the neutral compound formula by balancing charges, then displays the systematic name, formula, and molar mass with an elemental composition breakdown.
What is the difference between a cation and an anion?
A cation is a positively charged ion formed when an atom loses electrons, such as Na+ or Ca2+. An anion is a negatively charged ion formed when an atom gains electrons, such as Cl- or O2-. Cations are typically metals, while anions are typically non-metals.
How are ionic compounds named?
Ionic compounds are named by stating the cation name first followed by the anion name. For monatomic anions, the element name ending is changed to -ide (e.g., chlorine becomes chloride). For transition metals that can have multiple charges, the charge is indicated with a Roman numeral in parentheses, such as Iron(III) for Fe3+.
What does the Roman numeral in a chemical name mean?
The Roman numeral in parentheses after a metal name indicates its oxidation state or charge. For example, in Iron(II) chloride (FeCl2), iron has a 2+ charge, while in Iron(III) chloride (FeCl3), iron has a 3+ charge. This is necessary for transition metals that can form multiple stable ions.
How do you determine the formula of an ionic compound?
The formula of an ionic compound is determined by charge balance. The total positive charge from cations must equal the total negative charge from anions. The least common multiple of the charges gives the ratio. For example, Ca2+ and Cl- combine as CaCl2 because two chloride ions (2 x -1) balance one calcium ion (2+).
What is molar mass and how is it calculated?
Molar mass is the mass of one mole of a substance, expressed in grams per mole (g/mol). It is calculated by summing the atomic masses of all atoms in the chemical formula. For NaCl, the molar mass is 22.99 g/mol (Na) + 35.45 g/mol (Cl) = 58.44 g/mol.
What are polyatomic ions?
Polyatomic ions are groups of atoms that carry an overall electric charge and behave as a single unit in ionic compounds. Examples include ammonium (NH4+), nitrate (NO3-), sulfate (SO42-), and phosphate (PO43-). When multiple polyatomic ions are needed in a formula, they are enclosed in parentheses, such as (NH4)2SO4.
Can this calculator handle transition metals with variable charges?
Yes, the calculator includes transition metals with multiple oxidation states such as Iron(II)/Iron(III), Copper(I)/Copper(II), Manganese(II)/Manganese(III)/Manganese(IV), and Mercury(I)/Mercury(II). Each is listed separately with its charge indicated in the cation name, so you can select the correct ion for your compound.