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DAT Destroyer review > gen chem > Flashcards

gen chem Flashcards

1
Q

be super careful in choosing acid base pair eqns

A

yes

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2
Q

pay attention to wording!!

A

please

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3
Q

go with gut answer

A

yes

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4
Q

give me the half life formula for first order rxn

A

k (rate constant) t (half life)= 0.693

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5
Q

when given w/w, write out a conversion factor

A

like 2%–> 2g/ 100g

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6
Q

electrolysis of water eqn

A

2H2)->H2 + O2

- o2 is made at the anode!

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7
Q

always convert to

A

moles!

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8
Q

use dimensional analysis when confused

A

!!

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9
Q

how many molecules per mole?

A

6 x10^23

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10
Q

think very carefully about multiple option qns

A

pls

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11
Q

Molarity units

A

mols/ LITRE

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12
Q

when solution SUPER dilute acid or base

A

the pH is just 7!!

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13
Q

diiodine at room temp

A

is a SOLID

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14
Q

enthalpy of formation of liquid water

A

NOT 0!!!

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15
Q

molecular solids and melting and boiling points

A

LOW MELTING POINT, weak forces

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16
Q

network solid and boiling points

A

VERY HIGh melting point!!

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17
Q

rate law how to write

A

ONLY through experiment, NOT COEFFICIENTS EVER!

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18
Q

solubility in NH3

A

this is complexation!! Transition metals always form complex ions

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19
Q

don’t ever NOT look at periodic table!!

A

plz

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20
Q

lanthanides and actionids

A

fill 4f and 5f orbitals

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21
Q

gases at same pressure and temp

A
  • density and velocity will be different but temperature and molecule number is the SAME
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22
Q

higher concentration in buffer

A

means more buffer capacity.

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23
Q

lone pair counts in hybridization!!!

A

plz remember!!

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24
Q

second law of thermo

A

In most energy systems , energy is partly

converted to hεat. Thεre is an unstoppable move in the direction of disorder.

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25
Q

permanganate ion charge

A

-1

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26
Q

buffer is made up of

A

a wεak acid or a wεakbasε and its salt. recall if a strong acid or a strong base is in εxcess you no longer have a
buffer

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27
Q

when doing redox balancing

A

DO THE WHOLE THING REGARDLESS OF THE QN

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28
Q

when picking quantum numbers

A

remember s,p,d,f and l values!!

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29
Q

so3 polarity

A

nonpolar!

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30
Q

ideal gas at constant tem to not have same ___ energy

A

KINETIC ENERGY

- remember maxwell boltzman

31
Q

micro

A

-6

32
Q

milli

A

-3

33
Q

centi

A

-2

34
Q

nano

A

-9

35
Q

kilo

A

3

36
Q

pico

A

-12

37
Q

nh3 polarity

A

POLAR

38
Q

Heating must be carεfully controllεd to avoid (hydrate)

A

decomposing salt

39
Q

Always makε surε a samplε

is coolεd beforε it is wεighεd, since

A

it wεighs less because of buoyancy duε to convεction of air currεnts

40
Q

common insoluble boys

A

Ag, Hg, Pb as well as BaS04, and CaC03

41
Q

soluble boys

A

group IA metal (Alkali Metal) as well as NH4 or N03

42
Q

in any nuc decay stuff, what stays the same?

A

the atomic mass!

43
Q

butane is not just c4, its also

A

c4h10!!!!!

44
Q

review voltsic galvanic shit

A

plz

45
Q

practice using PV=nRT

A

PLZ

46
Q

PO4 charge

A

-3

47
Q

be careful with converting units!!

A

k and c

48
Q

don’t be stupid with pH and pOH calculation

A

plz

49
Q

photoelectric effect

A

the quantification of energy thing

50
Q

go back through qns 90-120

A

plz

51
Q

don’t get fooled when doing colligative properties with i

A

c2h5OH is still 1!!

52
Q

molality calculation

A

MOLES SOLUTE/ KG solvent!!!

53
Q

hydrate process

A

find moles of product, and moles water, then do RATIo like empirical formula

54
Q

0 order reaction slope

A

IS NEGATIVE K

55
Q

CN-, F-, NH4+ in water pH

A

are BASES U STUPIF

56
Q

HF is a… at room temp

A

GAS

57
Q

Homolysis

A

produces a radical pair

58
Q

mol bractket in electroplating

A

mole metal/ mole E- used to make it

** split apart the ion, and then find the charge. this is e

59
Q

e cell at eq is

A

zero

60
Q

heat of combustion using H

A

Products- reactants

61
Q

when is nernst eq used

A

adding something, and seeing how E changes!!

62
Q

nernst equation

A

E=Ecell-0.06/n(LogQ)

63
Q

-dH and +d.S are presεnt

A

a rεaction will proceed spontanεously at all tεlnperatures ，

64
Q

dH is + and dS is -,

A

it will not be spontι neous undεr any tempεrature

65
Q

+H and +S

A

spontaneous only at high temp

66
Q

-H and -S

A

spontaneous only at low temp

67
Q

be careful with final-initial for gases!

A

its not big-small #!

68
Q

burets are only used for

A

titrations!!!

69
Q

read the stupid qn

A

please

70
Q

when doing redox

A

only balance the atoms, don’t balance OH and H2O as well!!!! Be careful when copying down the coefficients too!!

71
Q

covalent bonds are not

A

IMF!

72
Q

catalyst and rate constant

A

INCREASES THE RATE CONSTANT

73
Q

PAY ATTENTION TO QN

A

please

DAT Destroyer review (4 decks)

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