chem paper 1
neutrwliswrioj examplw
Ba(OH)2 +HCL---> BaCl2 + 2H2O
what does gradient show on feasanility graph
- delta S
what does Y interceot show
delta H
what does x axis show
point wt which resction is fewsbile
when wont concentrwtion chnage for PH
if Ha/A- is the same
if metal is added how do you work out PH
1) work out moles of metal
2)HA moles - metal moles
3) A- moles + metal moles
4) new concentrwtion
enthalpy change of atomisation
the enthslpy chsnge when one mole of a solid ionic compound is formed from its gaseous ions under standard conditioms
lattice enthslpy
the enthslpy change that is associated with the formation of one mole of an ionic compound from its gaseous ions under standard conditioms
what do you dip your salt bridge into
KNO3
enthslpy change of hydratiom
the enthslpy chnage when 1 mole of gaseous ioms dissolve in water
average bond enthalpy
breaking of 1 mole of bonds in gaseous molecules
how do i work out y intercept
e^number
what happjes to kc if o2 increaxes in o2 + s--> 3SO3
1)O2 comc incresses
2) denominator in Kc expression increases
3) so yield of so3 increases and numerator increases
s +o2--> 3So3 ahat happnes if oressure increases
1) equlibriuk shifts to right
2) ratio in Kp exression decreases so ratio in kp expressiom imcreases to restore Kp
what happnes to kp if sjofts to right with pressure
1) rwtio of kc expression decreases
2) ratio of kc expression imcreases to restore kp
what happmes to kp if it shfts to left with pressure
1) ratio within kc espression increases
2) ratio within kc expression decreases to restore kp
what happmes if eq shiftd to left with conc
1) denominator within kp expression will increwse
2) so mire of thwt will yield amd numerwtor within kp expression will decrease to restore kp
what happnes to ph as you move down group 2
increases
how does hameoglobin transport oxygen sroumd body
o2 coordinatley bonds to fe2+. when required o2 released amd replaced by h20
whst does it mean if kp> 1
equilibirum position lies far on the right
what happnes when nh3 added
it reacts with h plus to for, nh4+ so poe shifftd to right
what are known tetrehsdral complexes
cocl4 and cucl4
what are known square planar
pt(nh3)2cl2
what is the expetion with chromium electron comfigerwtion
4s1 only
what is the weighted mean mass
the mean mass taking into account the realtive abundance of the isotopes
in rate steps why may we keep the concentrwtion in excess
so that the cocentration is effectivly constant
what colour is cl in non organic and organic
psle green
what colour is br is organic and non organic
orange
what colour is I is orgwnic and non organic
non organic - brown
organic - violet
oxidatiom eqiatiom
M-->M2+ +2e
reduction equation
M2+ +2e--> 2M
what must i do if workimf out neutraliswtiok
divide by numner of moles
what is the enthslpy change of solution
the enthslpy chnage when 1 mole of a solution dissolves
what ion does sc form
sc3+
what ion does zn form
zn2+
hwat is the atomic mass
the weighted mesn mass of an atom compared with 1/12 of the mass of an atom of c12
why does mg have a greater mp than na
as it contains more bonding electroms amd slso has a grester nuclesr chareg
why does atomic radius decrease scross period
although nuclear chwrge increases electrons added to same shell so outer electrons are more strongly attrwcted to the nuclues
vaporization of br
br(l)--> br(g)
what is enthslpy change of combustion
the enthslpy chnage when 1 mole of a compound reacts complelty eith o2
homolytic fissiom
breakin gof a covalent bond in whixh each atom recieves one electon from the bonding pair
comparison of pi bond to sigma
has a lower bond enthslpy
how do you we look to measure rate of reaction over time
measure mass loss
bow do imworkout rate
drsw tangent
+ sol
on left lattice down
on right two hydration down sol up
- sol
2 down on left so lattice snd sol
2 down on right so hyd snd hyd
when comparing lattice enthslpies what takes prirority ionic charge or rwdius
charge
if asked to workout dleta g and im giving delta sol what do i use as the delta H value
delta sol
what happjes to entropy if you have a cwrbonate
increwses as gas formed
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