CHEM 2070

Question 1

Element that is OXIDIZED is the…

Answer 1

REDUCING agent/REDUCTANT

Question 2

Element that is REDUCED is the…

Answer 2

OXIDIZING agent/OXIDANT

Question 3

Oxidation

Answer 3

LOSS of electrons (more positive charge)

Question 4

Reduction

Answer 4

GAIN of electrons (more negative charge)

Question 5

True or False: Polyatomic stay together/remain intact when dissociating

Answer 5

True

Question 6

Hydroxide

Answer 6

OH-

Question 7

Cyanide

Answer 7

CN-

Question 8

Thiocyanate

Answer 8

SCN-

Question 9

Peroxide

Answer 9

O2 2-

Question 10

Carbonate

Answer 10

CO3 2-

Question 11

Hydrogen carbonate

Answer 11

HCO3-

Question 12

Hypochlorite

Answer 12

ClO-

Question 13

Chlorite

Answer 13

ClO2-

Question 14

Chlorate

Answer 14

ClO3-

Question 15

Perchlorate

Answer 15

ClO4-

Question 16

Ammonium

Answer 16

NH4+

Question 17

Acetate

Answer 17

CH3COO-/C2H3O2-

Question 18

Oxalate

Answer 18

C2O4 2-

Question 19

Thiosulfate

Answer 19

S2O3 2-

Question 20

Chromate

Answer 20

CrO4 2-

Question 21

Dichromate

Answer 21

CrO7 2-

Question 22

Nitrite

Answer 22

NO2-

Question 23

Nitrate

Answer 23

NO3-

Question 24

Sulfite

Answer 24

SO3 2-

Question 25

Sulfate

Answer 25

SO4 2-

Question 26

Phosphite

Answer 26

PO3 3-

Question 27

Phosphate

Answer 27

PO4 3-

Question 28

Net ionic equation for acid/base

Answer 28

H+(aq) + OH-(aq) –> H2O(l)

Question 29

How to write complete/net ionic equations

Answer 29

Determine which is precipitate (solid) using solubility rules and that polyatomic ion stays together while other ions dissociate

Question 30

Water Solubility Rules for Salts

Answer 30

1. Most salts of GROUP 1 metals (Li+, Na+, K+, Rb+, Cs+) and AMMONIUM (NH4+) are SOLUBLE
2. Most salts of NITRATE (NO3-) and ACETATE (CH3COO-) are PERCHLORATE (PClO4-) are SOLUBLE
3. Most salts of Ag+, Pb2+, and Hg+ are INSOLUBLE
4. Most salts of Cl-, Br-, and I- (halogens) are SOLUBLE
5. Most CARBONATES (CO3 2-), PHOSPHATES (PO4 3-), SULFIDES (S2-), HYDROXIDES (OH-), OXIDES (O2-), and CHROMATES (CrO4 2-) are INSOLUBLE
   
   • However, SULFIDES and HYDROXIDES of Ca2+, Sr2+, and Ba2+ are SLIGHTLY SOLUBLE
6. Most SULFATES (SO4 2-) are SOLUBLE, except those of Ca 2+, Sr2+, and Ba2+, which are INSOLUBLE