Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
29 Cards in this Set
- Front
- Back
|
When charges of species in a reaction change, then it is a ______
|
redox
|
|
|
Redox means...
|
reduction & oxidation
|
|
|
Reduction means that charges do what?
|
go down, from a higher # to a lower #
|
|
|
Oxidation means that charges do what?
|
go up, form a lower # to a higher #
|
|
|
The charge on "free elements" (not ions) are all....
|
zero
|
|
|
A 0 charge to a +2 charge is a(n)…
|
oxidation
|
|
|
A +1 to a -3 charges is a(n)…
|
reduction
|
|
|
If an oxidation occurs, then a ____ also occurs.
|
reduction
|
|
|
The substance that contains the species that is oxidized is called the _____
|
reducing agent
|
|
|
The substance that contains the species that is reduced is called the ____
|
oxidizing agent
|
|
|
Oxidation occurs at the (location) ____. Anions migrate to it.
|
anode
|
|
|
Reduction occurs at the (location) _____. Cations migrate to it.
|
cathode
|
|
|
OIL RIG is...
|
a mnemonic device for remembering what happens in redox
|
|
|
In the mnemonic OIL RIG, OIL stands for...
|
Oxidation Is Loss of electrons
|
|
|
In the mnemonic OIL RIG, RIG stands for...
|
Reduction Is Gain of electrons
|
|
|
What happens with electrons in oxidation?
|
Lost a products
|
|
|
What happens with electrons in reduction?
|
Gained as reactants
|
|
|
The species that does not undergo redox is called....
|
Spectator Ions
|
|
|
The oxidation number of oxygen in a compound will nearly always be...
|
-2
|
|
|
The oxdiation number of hydrogen ion in a compound will nearly always be...
|
+1
|
|
|
The oxidation number of IA elements will always be...
|
+1
|
|
|
The oxdation number of IIA elements will always be...
|
+2
|
|
|
The oxidation numbers of a compound must algebraically add up to ....
|
zero
|
|
|
In a reduction half reaction, the electrons that are gained, must be written on the ____ of the arrow.
|
left
|
|
|
In an oxidation half reaction, the electrons that are lost, must be written on the ____of the arrow.
|
right
|
|
|
Double replacement reactions are _____ redox reactions
|
never
|
|
|
If you change the mnemonic device to OILa cRIG, it helps you remember that oxidation occurs at the _____ and reduction occurs at the ___. |
anode cathode |
|
|
What is the oxidation number of elemental chlorine (Cl₂), hydrogen (H₂), or oxygen(O₂) or other diatomic free elements? |
zero |
|
|
What is the oxidation number of S in sulfuric acid? |
+6 |
