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
Thank You!!! I needed alot of help with this...!!!!
Rubidium fluoride
Cupric oxide (because the Cu valance is +2; +1 is also possible)
Ammonium oxalate
I don't know the naming rules.
To name the compounds RbF, CuO, and (NH4)2C2O4, we will follow certain naming rules based on the type of compound.
1. RbF:
To name this compound, we need to identify the individual elements and their charges. Rb represents the element rubidium, and F represents the element fluorine. Rubidium is a Group 1 metal, so it has a charge of +1. Fluorine is a Group 17 nonmetal, so it has a charge of -1.
Using these charges, we can use the crisscross method to determine the correct subscript for each element to balance the charges. In this case, the subscript for Rb is 1, and for F it is 1 as well. Therefore, the compound is rubidium fluoride.
2. CuO:
To name this compound, we follow a similar process as above. Cu represents the element copper, and O represents oxygen. Copper's charge can vary, but in this case, it is in the form of CuO, which means copper has a charge of +2, and oxygen has a charge of -2.
Using the crisscross method again, we balance the charges by using subscript 1 for Cu and subscript 1 for O. Thus, the compound is copper(II) oxide.
3. (NH4)2C2O4:
This compound is a bit more complex as it contains both cations (NH4+) and an anion (C2O4^-2). In this case, we need to break down the formula.
NH4+ is known as the ammonium ion, which consists of one nitrogen atom and four hydrogen atoms. C2O4^-2 is known as the oxalate ion, which consists of two carbon atoms and four oxygen atoms.
Using the prefixes and suffixes for ion names, we identify that the compound starts with ammonium (NH4), followed by the prefix di for C2 (two carbon atoms), and ends with the suffix ate for oxide (O4).
Putting it all together, the compound is named ammonium oxalate.
To summarize the naming rules used:
- For simple compounds with a metal and a nonmetal, use the crisscross method to determine the subscripts and name the metal first, followed by the nonmetal with the -ide ending.
- For compounds containing transition metals, specify the charge of the metal using Roman numerals in parentheses after the metal's name.
- For compounds with polyatomic ions, name each ion separately and use prefixes and suffixes to indicate the number of atoms.