Chapter 11 Oxidation-Reduction rxns Flashcards
What is the oxidizing agent?
oxidizes another compound and is reduced
What is the reducing agent?
reduces another compound and is oxidized.
What is common amongst oxidizing agents?
almost all contain oxygen or an electronegative element.
What is common amongst reducing agents?
Often contain metal ions or hydrides (H–).
What is the overall trend for oxidation states?
They all keep their respective oxidation states unless an element is more (further up the group) or less (further down the group) electronegative.
*Except for two oxygens bound together, then each oxy is -1 not -2.
How to find overall charge of a compound?
Sum the oxidation numbers
Difference between complete ionic and net ionic equation?
Complete includes spectator ions (same on both sides of the equation) but net doesn’t.
- For double displacement (metathesis) reactions that do not form a solid
salt, there is no net ionic reaction because all ions remain in solution
and do not change oxidation number. - For reactions that contain no aqueous salts, the net ionic equation is generally the same as the overall balanced reaction
What is a Disproportionation (dismutation) reaction?
type of redox reaction in which one element is both oxidized and reduced, forming at least two molecules containing the element with different oxidation states.
What is a redox titration?
Transfer charge. Indicator changes with voltage.
What is Potentiometric titration?
redox titration in which a
voltmeter or external cell measures the electromotive force (emf) of a solution. equivalence point is determined by a sharp change in voltage. No indicator used.
How are cation and anion written in formulas?
Cation first and anion second
When writing net ionic equations what do you do with solids?
Keep them whole, don’t split. Only split aqueous
