Lecture 1

Question 1

Solubility rules for predicting percipate

Answer 1

1.) All group 1 slats (Na,…) and NH4+ are soluble(aq)

2.) NO3(-), CH3COO(-), CIO4(-) are insoluble (solid)

Question 2

Neutralization RXN

Answer 2

Acid+ Base = Salt + H2O

Question 3

2 way to find mass percent

Answer 3

From just chemical formula:
1.) %E = (#AE) (MME)/ (MMC)

From masses of Element and compound given:

2.) %E = (MME)/ (MMC)

Question 4

Avaagoes number

Answer 4

6.022 • 10^23

Used to covert from mols to moles, atoms, ions

Question 5

Pre fixes to 8

Answer 5

1- mono
2- di
3-tri
4- tetra
5- penta
6- hexa
7- hepta
8- Octa

Question 6

Naming molecular (NM and NM) compound rules

Answer 6

1.) Add prefixes
2.) Change ending to ide of second element
3.) If 2nd element begins with O or A abs tye prefixes ends in O or A take it off. Eg Mono and Oxygen. Monoxide

Question 7

Hydrate complex naming rule

Answer 7

1.) H2O is referred to as hydrate
2.) add prefix in front of hydrate depending on how many H2O molecs are present
3.) Name first part of the formal name regularly using Ionic or molecular rules

Question 8

Ions with multiple charges (7)

Answer 8

Fe (Iron) - 2,3
Co (cobalt)- 2 ,3
Pb (lead)- 2 , 4
Hg (mercury)- 1 (Hg2^2+), 2
Cu (copper)- 2, 1
Cr (cronium)- 2,3
Sn (tin)- 2,4

Question 9

NH4 (+)

Answer 9

Ammonium

Question 10

C2H3O2 (-)

Answer 10

Acetate ( CH3COO^-)

Question 11

CO3 (2-)

Answer 11

Carbonate

Question 12

HCO3 (-)

Answer 12

Bi carbonate

Question 13

CIO3 (-)

Answer 13

Percholrate

Question 14

CIO3-

Answer 14

Cholerate

Question 15

CIO2 (-)

Answer 15

Cholrite

Question 16

CIO (-)

Answer 16

Hypoclorite

Question 17

MnO4 (-)

Answer 17

Permanganate

Question 18

SO4 (2-)

Answer 18

Sulfate

Question 19

CrO4 (2-)

Answer 19

Chromate

Question 20

Cr2O7(2-)

Answer 20

Dichromate

Question 21

CN-

Answer 21

Cynaide

Question 22

OH-

Answer 22

Hydroxide

Question 23

NO3 (-)

Answer 23

Nitrate

Question 24

NO2 (-)

Answer 24

Nitrite

Question 25

C2O4 (2-)

Answer 25

Oxalate

Question 26

PO4 (3-)

Answer 26

Phosphate

Question 27

S2O3 (2-)

Answer 27

Thiosulfate

Question 28

SO3 (2-)

Answer 28

Sulfite

Question 29

How to find empirical formula

Answer 29

1- % - grams (100)
2- g - mols
3.) divide by smallest mol
4.) get whole # if not multiply by (2,3,4,5)
5.) Take this and multiple by molecule given to get EF

Question 30

How to find EF of combustion analysis with No oxygen calculations

Answer 30

CH + O2 = CO2 + H2O
You have excess O2

Use empirical formula rules
Calculate mols of C from mass of CO2
Calculate mols of H from mass of H2O

Question 31

Combustion Anylasis with oxygen

Answer 31

CHO + O2 = CO2 + H2O

• find mass of O by using grams of C and H. Can find from mols if these elements
• then Add mass of C and H. Then sun from CHO. Then subtract from CHO in the end to find mass of O.
• convert mass of O into mols of O and follow the rules to find EF

Question 32

Si units

Answer 32

Kilo (k) - 10^3
Deci (di)- 10^ -1
Centi (c)- 10^-2
Milli (m)- 10^-3
Micro ( )-10^-6
Nona ( n) 10^-9
Pico ( p) 10^-12

Question 33

Density

Answer 33

Mass/ volume

Question 34

Density of water at room temp

Answer 34

1.00 g/ml

Question 35

1 ml=

Answer 35

1cm^3

Question 36

1L =

Answer 36

1dm^3