Naming Compounds Part II (featuring covalent and acid)

Today's class was no doubt fantastic. We started out the day with the wonderful news that the test has been moved back one day. The test is now on Friday, October 15. After the news had been bestowed upon us, we reviewed polyatomic ions, at the request of Ben. Polyatomic ions are groups of atoms that may carry a charge. Just a reminder, these are the six polyatomic ions we are supposed to know:

OH(^-) hydroxide
NH4(^+) ammonium
NO3(^-) nitrate
CO3(^2-) carbonate
PO4(^3-) phosphate
SO4(2-) sulfate
SORRY I DIDN'T GET THE FORMAT RIGHT. I TRIED MY BEST!

From there, we jumped right into the lesson. Today's lesson was a continuation of naming compounds. However, instead of naming ionic compounds, we named covalent compounds and acids. First, the covalent compounds. Here are a list of characteristics covalent compounds possess.

1) The suffix of the second word is -ide
2) Covalent compounds are comprised of nonmetals (and metalloids, on occasion)
3) The second word always contains a Greek prefix
4) The charges do not have to balance (which is awesome.)

According to Mr. Lieberman, covalent compounds are, "easier than ionic compounds because you don't have to balance all of that mumbo-jumbo..." That was pure insight. Incredibly whimsical.

To name a covalent compound, do the following:
1st word: Use prefix if there is more than one subscript number. If not, keep the same
2nd word: Always use prefix, and change suffix to -ide.
On a side note, there are no polyatomics (Prodigious!!!)

Here are a few examples of naming covalent compounds:
SiO2: silicon dioxide
NO2: nitrogen dioxide
S2Cl2: disulfur dichloride
PCl3: Phosphorous trichloride

Covalent compounds are also referred to as Binary Molecular Compounds. Unlike ionic compounds, there is no simple way to deduce the formula of a binary molecular compound. That being said, acids will be deciphered now...

Here are a couple characteristics of Acids:
1) Acids all start with H (Water is the only exception; it is not an acid)
2) Acids must be in water

To name an acid, just do the following:
IF THE ANION DOES NOT CONTAIN OXYGEN:
Change ending to "ic" and add prefix hydro
For example:
HF- Hydrofluoric acid
HCl- Hydrochloric acid
IF THE ANION CONTAINS OXYGEN:
- "ate" becomes "ic"
-H4SO4: sulfuric acid
- "ite" becomes "ous"
-HNO2: nitrous acid
To remember this, think of the joke: I'm coming down with a bad case of ateic iteous (I get it now Mr. Lieberman)

Then, we were done naming these compounds!!! After the lesson, we all took whiteboards; markers; and paper towels, and practiced naming compounds some more.

Then all of a sudden, amidst the rage and excitement, the bell rang. We proceeded to put our supplies away in a neat and orderly manner, and exited the classroom.

The next scribe is... Ben Ach!!! (no me grites)

Naming Compounds

We began class this fine Friday afternoon with a happy reminder that we have a BIG test covering the whole unit coming up on this Thursday, October 14. So remember to have all of your book problems and worksheets done and ready to be graded. We also have a Chemthink on Ions due this Monday.

After going over the things happening next week, we worked on the sheets, which we had picked up at the beginning of class, with our partners. The sheet was called naming compounds. On the first side of the sheet was a list of compounds, which consisted of a metal and non-metal. When you have a compound of a main metal and a non-metal you characterize it it with a two part name. The first word in the name is the metal, or the positively charged ion. And the second part would be the non-metal, or the negatively charged ion. The second part, the non-metal, always ends with the suffix "-ide." So we tried our luck at naming a few ourselves.

Some examples are:

- NaBr Which is Sodium Bromide

- CaF₂ Which is Calcium Fluoride

- Al₂S₃ Which is Aluminum Sulfide

After that we flipped the page over and did part 2, the difference now was that we were using transitional metals which can have multiple charges. So to wright the name of one of these you do the first name which is the transitional metal, or positively charged ion then you do the Roman numeral number for the charge in parentheses. Then you would wright the second part for the next element which would ,again, end in "-ide."

Some examples are:

- FeBr₃ Which is Iron (III) Bromide

- NiS Which is Nickle (II) Sulfide

- CoCl₂ Which is Cobalt (II) Chloride

After we had finished the worksheet we went back to our seats and went over some notes. These notes were from slides "Names of compounds-Cations" to "Ionic Compounds." At the end of class he told us to remember some polyatomic ions, such as:

OH- Hydroxide

NH₄⁺ Ammonium

NO₃^- Nitrate

CO₃^2- Carbonate

PO₄^3- Phosphate

SO₄^2- Sulfate

The other naming compounds worksheet we received is due thursday (the day of the test.)

Also start studying for the test and a pop-quiz we were warned about which could come on Monday or Tuesday.

Now the next scribe will be... John A.