4. Given the chemical formulas of the following compounds, name each compound and state the rules you used to determine each name.
• RbF
• CuO
• (NH4)2C2O4
(Note: C2O4– is called oxalate.)
I'll give you the names. You figure out the rules.
Rubidium fluoride
copper(II) oxide (the old name is cupric oxide)
ammonium oxalate.
ThaNK YOU SO MUCH!!!!! I really needed anytype of help with this problem...
To name the compounds given their chemical formulas, we will follow the rules and guidelines set by the International Union of Pure and Applied Chemistry (IUPAC) for naming inorganic compounds.
1. RbF:
The compound with the chemical formula RbF consists of the elements rubidium (Rb) and fluorine (F). To name this compound:
- The cation (Rb+) comes first, and its name remains unchanged: rubidium.
- The anion (F-) is named by changing the ending of the element name to -ide: fluoride.
The name of the compound is rubidium fluoride.
2. CuO:
The compound with the formula CuO consists of the elements copper (Cu) and oxygen (O). To name this compound:
- The cation (Cu2+) comes first, and its name remains unchanged: copper.
- The anion (O2-) is named by changing the ending of the element name to -ide: oxide.
The name of the compound is copper(II) oxide or cupric oxide.
3. (NH4)2C2O4:
The compound with the formula (NH4)2C2O4 consists of the ammonium ion (NH4+) and the oxalate ion (C2O4-).
- The cation (NH4+) is known as the ammonium ion and keeps its name unchanged.
- The anion (C2O4-) is called oxalate.
Since there are two ammonium ions present in the formula, we use the prefix ‘di-’ to indicate the number of ammonium ions.
The name of the compound is diammonium oxalate.
In summary, the rules used to determine the names are:
- Cations are named first and keep their original name.
- Anions are named last, and the element name is changed to end in -ide.
- Use prefixes such as di-, tri-, tetra-, etc., to indicate the number of ions if necessary.
To name each compound, we need to follow the rules of chemical nomenclature. Here are the rules used to determine the names:
1. Naming compounds with metal cations:
- RbF: The chemical formula RbF contains the metal cation Rb+ and the anion F-. The name of the compound is determined by using the name of the metal cation (rubidium) followed by the name of the non-metal anion (fluoride). So, RbF is named rubidium fluoride.
2. Naming compounds with transition metal cations:
- CuO: In this case, the chemical formula CuO contains the transition metal cation Cu2+ and the anion O2-. Transition metals can have different charges, so their charges must be indicated using a roman numeral in parentheses. Since copper has a charge of 2+, the name of the compound is determined by using the name of the transition metal cation (copper) followed by the roman numeral (II) in parentheses, and then the name of the non-metal anion (oxide). So, CuO is named copper(II) oxide.
3. Naming compounds with polyatomic ions:
- (NH4)2C2O4: This compound contains both a polyatomic cation (ammonium, NH4+) and a polyatomic anion (oxalate, C2O4-). The name of the compound is determined by using the name of the cation (ammonium) followed by the subscript 2 (since there are two ammonium ions), and then the name of the anion (oxalate). So, (NH4)2C2O4 is named ammonium oxalate.
4. Additional note:
- C2O4– is called oxalate: In this case, the formula C2O4- represents the polyatomic ion oxalate with a charge of 2-. The name of the ion is determined by using the root name (oxal) followed by the suffix -ate. So, C2O4- is called oxalate.
Remember, when naming compounds, it's important to pay attention to the charges of the ions and use the appropriate names for the cations and anions.