Ch.3 - Chemical ReactionsWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: Determine the subscript for ammonium in the chemical formula for ammonium dichromate?

Problem

Determine the subscript for ammonium in the chemical formula for ammonium dichromate?

Solution

We are asked to determine the subscript of ammonium in the chemical formula of an ionic compound with polyatomics, ammonium dichromate.


A binary ionic compound with polyatomics has the following features:

  • A metal or a positive polyatomic species (Cation)
  • A nonmetal or negative polyatomic species (Anion)


Rules for Naming:

1. The metal or the positive polyatomic species is named and written first.

If the metal is a transition metal, we must use a Roman Numeral to describe its positive charge.


2. The nonmetal retains its base name followed by the suffix -ide while the negative polyatomic species retains its name.

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