Topic 3- Lecture 14

Question 1

Common acidic reductions

Answer 1

Nitrate= NO3- ---> NO
Permanganate= MnO4- ---> Mn2+
Dichromate= Cr2O7 2- ---> Cr3+

Question 2

Polyatomic oxidation of acids

Answer 2

Sulfite to sulfate

SO3 2- —> SO4 2-

Question 3

Oxidation of hydrogen peroxide

Answer 3

H2O2 —-> O2

Question 4

____________ are oxidized over ___________

Answer 4

Metals, Nonmetals

Question 5

Basic solutions have high concentrations of _____________ ions

Answer 5

Hydroxide OH-

Question 6

Reductions in basic solutions

Answer 6

Permanganate

MnO4- —> MnO2

Question 7

_____ replace _____ in basic solutions

Answer 7

OH-, H+

Question 8

H ions and hydroxide ions form…

Answer 8

Water

Question 9

Known concentration

Answer 9

Titrant

Question 10

Color change signals…

Answer 10

Endpoint

Question 11

Occurs when equal numbers of moles of the species being oxidized and the species being reduced have combined

Answer 11

Equivalence point

Question 12

Causes oxidation, gets reduced

Answer 12

Oxidizing agent

Question 13

Causes reduction, gets oxidized

Answer 13

Reduction agent

Question 14

Acidic solutions reaction rules

Answer 14

1) write unbalanced half reactions
2) balance all atoms except for O and H
3) balance O by adding H2O
4) balance H by adding H+ ions
5) balance charges by adding electrons
6) cross multiply to cancel electrons
7) add half reactions