Showing posts with label polyatomic. Show all posts
Showing posts with label polyatomic. Show all posts

Monday, February 2, 2009

3.06 - Acid Base Nomenclature - 14:48



KEY CONCEPTS: When naming Binary Acids, start by identifying the hydrogen atom as "hydro" and name the non-metal using the "ic" ending and add the word acid.

Rules for Oxy-Acids:

They are derivatives of polyatomic ions and polyatomic variations. Follow the following 4 rules:

i.) ____ate ions become _______ic acid
ii.) per____ate ions become per_____ic acids
iii.) ____ite ions become _____ous acids
iv.) hypo____ite ions become hypo_____ous acids

Bases contain hydroxide ion (OH)-1

**NOTE: NO "hydro" for oxy-acids

Sunday, February 1, 2009

4.02 - Balancing Equations - 22:35



KEY TERMS: balance both sides of the equation by placing a number (coefficient) in front of the compound. Don't be afraid to have to change that number if it does not completely balance the equation. Balance polyatomic ions first. Remember that REACTANTS are to the left of the arrow and PRODUCTS are to the right of the arrow. Refer to episode on "Counting Atoms". Don't forget your diatomic molecules:

oxygen = O2
hydrogen = H2
bromine = Br2
chlorine = Cl2
iodine = I2
fluorine = F2
nitrogen = N2

Tuesday, January 27, 2009

3.05 - Polyatomic Variations - 10:14



KEY CONCEPTS: Always refer to the original form of the polyatomic ion.

From the original form: _____ate ion, if:
i.) you gain an oxygen, name changes to per____ate ion.
ii.) lose 1 oxygen, name changes to _____ite ion.
iii.) lose 2 oxygens, name changes to hypo____ite ion.

**NOTE: the charge of the polyatomic NEVER changes