Chapter 4.6 Element in Redox Reactions

Question 1

combination redox reactions

Answer 1

two or more reactants (one has to be an element) form a compound: X + Y -> Z

Question 2

Combining Two Elements

Answer 2

two elements may react to form binary ionic or covalent compounds:

1. Metal and nonmetal form an ionic compound
2. Two nonmetals form a covalent compound

Question 3

Combining Compound an Element

Answer 3

many binary covalent compounds react w/ nonmetals to form larger compounds. Many nonmetal oxides react w/ additional O2 to form “higher” oxides

Question 4

Decomposition Redox Reactions

Answer 4

a compound forms two or more products (at least one is an element): Z -> X + Y

Question 5

thermal decomposition

Answer 5

energy absorbed is heat

Question 6

electrolytic decomposition

Answer 6

a compound absorbs electrical energy and decomposes into its elements

Question 7

displacement reaction

Answer 7

the number of substances on the two sides of the equation remains the same, but atoms (or ions) exchange places:

1. Double displacement (metathesis) reactions, two compounds exchange places; ex. AB + CD -> AC + BD
2. Single - displacement reactions occur when an atom of one element displaces the ion of another

Question 8

Combusyion reaction

Answer 8

the process of combining w/ oxygen most commonly with the release of heat and the production of light