Exam 4

Question 1

Ox# of group1A elements

Answer 1

1+ (cept H2)

Question 2

Ox# of group 2A in comps

Answer 2

2+

Question 3

Ox#in group 7A comps

Answer 3

1-

In binary comps with metals

Question 4

Ox# of oxygen

Answer 4

2- almost always

Question 5

Ox#of hydrogen

Answer 5

1+

Cept with ionic bonds with metals

Question 6

Balancing redox reactions

Answer 6

1. Write half equations
2. Balance elements not O or H
3. Balance O by adding H2O
4. Balance H by adding H+
5. Balance charge by adding e-
6. Multiply by something to make e-=
7. Add half-reactions
8. If in BASIC soln:
   Add OH- ions to both sides equalling the # of H+ ions.

Question 7

Oxidation

Answer 7

Loss of electrons

Question 8

Reduction

Answer 8

Gain of electrons

Question 9

Ox# fluorine

Answer 9

1- in all comps