gen chem Flashcards
be super careful in choosing acid base pair eqns
yes
pay attention to wording!!
please
go with gut answer
yes
give me the half life formula for first order rxn
k (rate constant) t (half life)= 0.693
when given w/w, write out a conversion factor
like 2%–> 2g/ 100g
electrolysis of water eqn
2H2)->H2 + O2
- o2 is made at the anode!
always convert to
moles!
use dimensional analysis when confused
!!
how many molecules per mole?
6 x10^23
think very carefully about multiple option qns
pls
Molarity units
mols/ LITRE
when solution SUPER dilute acid or base
the pH is just 7!!
diiodine at room temp
is a SOLID
enthalpy of formation of liquid water
NOT 0!!!
molecular solids and melting and boiling points
LOW MELTING POINT, weak forces
network solid and boiling points
VERY HIGh melting point!!
rate law how to write
ONLY through experiment, NOT COEFFICIENTS EVER!
solubility in NH3
this is complexation!! Transition metals always form complex ions
don’t ever NOT look at periodic table!!
plz
lanthanides and actionids
fill 4f and 5f orbitals
gases at same pressure and temp
- density and velocity will be different but temperature and molecule number is the SAME
higher concentration in buffer
means more buffer capacity.
lone pair counts in hybridization!!!
plz remember!!
second law of thermo
In most energy systems , energy is partly
converted to hεat. Thεre is an unstoppable move in the direction of disorder.
permanganate ion charge
-1
buffer is made up of
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
when doing redox balancing
DO THE WHOLE THING REGARDLESS OF THE QN
when picking quantum numbers
remember s,p,d,f and l values!!
so3 polarity
nonpolar!
ideal gas at constant tem to not have same ___ energy
KINETIC ENERGY
- remember maxwell boltzman
micro
-6
milli
-3
centi
-2
nano
-9
kilo
3
pico
-12
nh3 polarity
POLAR
Heating must be carεfully controllεd to avoid (hydrate)
decomposing salt
Always makε surε a samplε
is coolεd beforε it is wεighεd, since
it wεighs less because of buoyancy duε to convεction of air currεnts
common insoluble boys
Ag, Hg, Pb as well as BaS04, and CaC03
soluble boys
group IA metal (Alkali Metal) as well as NH4 or N03
in any nuc decay stuff, what stays the same?
the atomic mass!
butane is not just c4, its also
c4h10!!!!!
review voltsic galvanic shit
plz
practice using PV=nRT
PLZ
PO4 charge
-3
be careful with converting units!!
k and c
don’t be stupid with pH and pOH calculation
plz
photoelectric effect
the quantification of energy thing
go back through qns 90-120
plz
don’t get fooled when doing colligative properties with i
c2h5OH is still 1!!
molality calculation
MOLES SOLUTE/ KG solvent!!!
hydrate process
find moles of product, and moles water, then do RATIo like empirical formula
0 order reaction slope
IS NEGATIVE K
CN-, F-, NH4+ in water pH
are BASES U STUPIF
HF is a… at room temp
GAS
Homolysis
produces a radical pair
mol bractket in electroplating
mole metal/ mole E- used to make it
** split apart the ion, and then find the charge. this is e
e cell at eq is
zero
heat of combustion using H
Products- reactants
when is nernst eq used
adding something, and seeing how E changes!!
nernst equation
E=Ecell-0.06/n(LogQ)
-dH and +d.S are presεnt
a rεaction will proceed spontanεously at all tεlnperatures ，
dH is + and dS is -,
it will not be spontι neous undεr any tempεrature
+H and +S
spontaneous only at high temp
-H and -S
spontaneous only at low temp
be careful with final-initial for gases!
its not big-small #!
burets are only used for
titrations!!!
read the stupid qn
please
when doing redox
only balance the atoms, don’t balance OH and H2O as well!!!! Be careful when copying down the coefficients too!!
covalent bonds are not
IMF!
catalyst and rate constant
INCREASES THE RATE CONSTANT
PAY ATTENTION TO QN
please
