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Flashcards in DAT Destroyer Gen Chem Deck (32):
1

what is molar mass

the Grams/Moles of a substance

2

what does an increase in number of dissolved particles do to freezing and boiling points

more particles = lower freezing point
and higher boiling point

3

what is something to consider when evaluating solubility

the common ion effect

4

What are diamagnetic elements

ones that all of the electron spins are paired

5

what happens in the electrolysis of water

Electricity is passed through water
O2 and H2 are produced ( 2H moles per O mole)
O2 at the anode, H2 at the cathode

6

What are the physical states of Cl2, W, K, Pb, Hg, Br2, and Sb at 25 degrees celcius

Cl2 is a gas
HG and Br2 are liquids
W, K, Pb, Sb are solids

7

what is molecular mass

how much one mole weighs (g/mol)

8

when is the standard enthalpy of formation = 0 (with 1 atm and at 25 degrees celcius)

when you are working with pure elements of diatomic molecules in their most stable form

9

What is the most stable forms of
Cl2
I2
H2
Br2
H2O at standard temp and pressure

Cl2 and H2 are gases
I2 is a solid
Br2 and H2O are liquids

10

what is the melting point of ionic compounds

they are usually high melting point solids

11

Which is stronger network or molecular solids

network (diamonds)

12

Can you get the rate law from a balanced equation?

nope, it must be figured out experimentally

13

What does Ksp mean for solubility

the higher the Ksp, the higher the solubility

14

What kinds of things are very soluble in NH3 and why

compounds with transition metals, because they form complexes with the NH3

15

How much of the human body is made up of oxygen

65%

16

is the Si-O bond weak or strong

very strong

17

how does metallic character change across the periodic table

it is the highest in the bottom left

18

which usually has higher melting points metals or non metals

metals

19

how do you know which molecules in a gas move the fastest

the lightest ones move the fastest

20

When at STP how do you know which gas in the most dense

the one with the highest mass

21

what defines a redox reaction

a change in oxidation number

22

what are three types of elemental carbon

diamonds
graphite
buckminsterfullerene

23

what is group one called, two called

alkali
alkaline earth metals

24

what is the henderson hasselbach equation for buffers

pH = pKa + log (salt/acid)

25

should you add water to acid or acid to water

acid to water, because it is a violently exothermic reaction and can splash out if you add water to acid

26

What ions can As produce

+3
-3
+5

27

how do you balance redox reactions

1. separate the two equations
2. balance O's with H2O
3. balance H's with H+
4. balance charges with e-'s
5. combine reactions to cancel out e-'s

28

do ionic compounds form individual molecules

nope, they just form crystals

29

aside from electronegativity what can make substances polar

if they have uneven electron pairs

30

do all molecules in an ideal gas have the same kinetic energy at constant temperature

nope

31

what are dessicators used for

to prevent the uptake of moisture

32

what are some insolubility clues

Ag, Hg, Pb are all likely unsoluble
BaSO4 and CaCO3, CaOH are unsoluble