Redox Reactions Flashcards Preview

Chem 1410 - UNT > Redox Reactions > Flashcards

Flashcards in Redox Reactions Deck (18):
1

X + YZ ---> XZ + Y What type of reactions is the above equation? Is this a redox reaction?

Single displacement reactions. Yes, this is a redox reaction. In single-displacment reactions, one of the substances is an element; therefore all single-displacement reactions ARE redox processes.

2

When the energy absorbed is heat, the reaction is called a ______________.

thermal decomposition

3

When one reactant has a greater ______ for electrons than another, there is a net ______ of electrons, and a _____________ takes place.

attraction; movement; redox reaction

4

What type of process does a compound absorb electrical energy and decomposes into its elements?

Electrolytic Decomposition

5

Name the redox reaction when one substance forms two.

Decomposition

6

True or False? In combination redox reactions, one element displaces the ion of another from solution.

False. It should be displacement redox reaction.

7

a) Name the redox reaction when two substances form one. 3Mg(s) + N2(g) ----> Mg3N2(s) O.N. 0 0 +2 -3 b) Which is the reducing agent? c) Which is the oxidizing agent?

a) Combination b) Mg is the reducing agent; c) N2 is the oxidizing agent

8

What does the mnemonic LEO the lion says GER?

LEO: Loss of Electrons is Oxidation; GER: Gaining Electrons is Reduction

9

AB + CD ---> AC + BD What is the type of reaction the equation above? Is this a redox reaction?

Double Displacement (metathesis) reaction. This is NOT a redox reaction. In double-displacement (metathesis) reactions, such as precipitation and acid-base reaction, atoms (or ions) of two *compounds* exchange places.

10

Rank the reactivity of the following halogens Group 7A(17):

Br2

Cl2

F2

I2

Reactivity of the elements decreases down Group 7A(17). Therefore,

 

F2 > Cl2 > Br2 > I2

11

In _________ redox reactions, compounds break down by ________ of heat or electricity into elements or into a compound and an element.

decomposition; absorption

12

What type of bond do a metal and a non-metal form?

Ionic

13

A halogen higher in the group is a ___________ oxidizing agent than one lower down.

Stronger

14

What type of bond do two non-metals form?

Covalent

15

What is the O.N. for O in peroxides?

-1

16

True or False? A reaction that has an element as a reactant or product is a redox reaction.

True

17

_______________ releases heat through a redox reaction of a substance with O2.

Combustion

18

What type of substance does a combustion release heat through a redox reaction?

O2