Redox Flashcards
What are oxidation numbers given?
Roman numerals
What is the oxidation number of an uncombined element?
0
What do the oxidation numbers of all the atoms in a molecule add up to?
0
What is the oxidation number of a simple ion?
the charge of the ion
What are the oxidation numbers of group 1, group 2 and group 3 metals?
+1
+2
+3
What the oxidation number of a fluorine atom?
-1
What is the oxidation number of a hydrogen atom?
+1 (NaH is an exception)
What is the oxidation number of oxygen?
-2
What is oxidation?
-loss of electrons
-increase in oxidation number
What is reduction?
-Gain of electrons
-Decrease in oxidation number
When analysing reactions what is oxidation?
-loss of hydrogen
-gain of oxygen
When analysing organic reactions what is reduction?
-gain of hydrogen
-loss of oxygen
When calculating the oxidation number what should you start with?
-metal first unless it is a transitional metal
What are spectator ions?
ions that remain uncharged
What happens to a reducing agent?
it becomes oxidised
what happens to the oxidising agent?
it becomes reduced
What are the other names for the oxidising and reducing agent?
-Oxidant
-Reductant
What does -ate mean?
-negative ion know it’s oxygen
What is disproportionation?
a type of redox reaction where the same element is both oxidised and reduced
What the chemical accepting the electrons in a redox reaction?
oxidising agent
What is the chemical donating the electrons in a redox reaction called?
the reducing agent
What does the electron configuration of an atom describe?
the arrangement of electrons in the shells
How are electrons placed?
Into shells- starting with the lowest energy level first
