Topic 3- Redox I Flashcards
What do oxidation numbers tell you about?
The movement of electrons
Elements that have bonded to identical atoms will have an oxidation number of….
0
The oxidation number of a simple, monatomic ion is ….
the same as it’s charge so Cl would be -1.
What does monatomic ion mean?
consisting of just one atom
How do we determine the difference between charge and oxidation number?
charge = 2+
whereas for oxidation the symbol comes first
+2
What is the rule for molecular ions?
The sum of the oxidation numbers is the same as the overall charge of the ion. (each constituent atom will have its own oxidation number)
What is a molecular ion?
ions that are made up of a group of atoms with an overall charge
What is the rule for neutral compounds?
The overall charge is 0, but the sum of the oxidation numbers will also be 0.
Hydrogen always has an oxidation number of ….. except in ….. …… where it is …. and in …… where it’s …..
Hydrogen always has an oxidation number of +1 except in metal hydrides where it is -1 and in molecular hydrogen (H2) where it’s 0.
Oxygen nearly always has an oxidation number of … except in ….. where it’s … and ….. where it’s …..
Oxygen nearly always has an oxidation number of -2 except in peroxides ( O2(2−)) where it’s -1 and molecular oxygen where it’s 0.
Roman numerals tell you the …..
oxidation number.
What is an oxidation number?
A measure of the “combining power” of an element.
how many bonds it forms in a given compound
Fluorine is the most…..
electronegative in the periodic table.
The oxidation number of fluorine in all it’s compounds is ….
-1
What are the 2 extremely important things to remember when discussing oxidation numbers?
Oxidation involves an increase in oxidation state
Reduction involves a decrease in oxidation state
