name the following compounds and tell what type of compound they are (binary ionic. ternary ionic, or binary molecular)
a)FeBr3
b)CBr4
c)Na2Cr2O7
I thought I gave you the sites to provide information for naming and classifying these compounds a couple days ago.
i still didn't get it.. so i reposted
In order to name compounds and determine their type (binary ionic, ternary ionic, or binary molecular), we first need to understand the nature of the elements present and the rules of nomenclature.
a) FeBr3:
To name the compound FeBr3, we first identify the elements involved. Fe represents the symbol for iron, and Br stands for bromine. From this information, we can determine that FeBr3 consists of iron and bromine.
Next, we consider the charges of the individual ions involved. Iron (Fe) typically forms cations with a charge of +2 or +3, while bromine (Br) forms an anion with a charge of -1.
Since the overall charge of the compound is neutral, we can deduce that three bromine ions are needed to balance the charge of the iron cation. Therefore, the compound FeBr3 is named Iron(III) bromide. It is a binary ionic compound since it consists of a metal and a nonmetal.
b) CBr4:
For the compound CBr4, we have the element C representing carbon and Br representing bromine. Since both elements are nonmetals, it is likely that this is a binary molecular compound.
Using prefixes, we indicate the number of atoms present for each element based on their subscript values. The prefixes are as follows:
- 1: mono-
- 2: di-
- 3: tri-
- 4: tetra-
Applying these prefixes to the element names, we have carbon tetrabromide for CBr4. Thus, CBr4 is named carbon tetrabromide, and it is a binary molecular compound.
c) Na2Cr2O7:
The compound Na2Cr2O7 contains three different elements: sodium (Na), chromium (Cr), and oxygen (O). To determine its compound type and name, we analyze the charges of the ions.
Sodium (Na) forms a cation with a charge of +1, while oxygen (O) forms an anion with a charge of -2. Chromium (Cr) can have multiple charges, so we need to use its charge to determine the compound's name.
Considering the overall charge of Na2Cr2O7, it is neutral, indicating that we will need to use two sodium cations to balance the charge. This implies that the compound has a polyatomic ion as well.
The polyatomic ion present is called dichromate. It consists of two chromium ions (Cr3+) and seven oxygen ions (O2-). Therefore, the compound Na2Cr2O7 is named sodium dichromate. It is a ternary ionic compound since it consists of a metal and a polyatomic ion.
To summarize:
- FeBr3 is named Iron(III) bromide and is a binary ionic compound.
- CBr4 is named carbon tetrabromide and is a binary molecular compound.
- Na2Cr2O7 is named sodium dichromate and is a ternary ionic compound.