Question:

 Answer

Debate

Marks
(105
total)

Q1 : suggest the
element:

What two
differences exist
between
Thomson's model
and the current
Model:

Electron impact
equation of
tellurium

Boron

Plum pudding model

Electrons orbit in shells.

(in modern model) Protons and neutrons
in the nucleus, whereas in Thompson’s model there was only positive charge

Electrons are
negatively charged, not
positive as suggested
above.

Electrons are in different fixed
energy shells.

Positive charge is
concentrated in a small
nucleus

New model shows that
most of the atom is
made of empty space

Te(g)-----> Te^+(g)+e^-

Te (g) + e- -> Te+ (g) +
2e-+

How did yall find the exam/ gen
asking

I found it quite nice icl, but its mixed
opinions

Meh

WASNT IT 2 DIFFERENCES?

Theres always paper 2 and 3 to do
much better on if you feel like u
didnt do amazin. + if it was hard,
the grade boundaries may be lower

Yh it will be 68% for A instead of
70%

How’d you find it

I absolutely hated the 6
markers😭both of them made me
cryyyy

Haha literally same

IRON CATALYST ARE U FR?😭

Is this aqa i dont remember a
suggest th  e element question?

• Im pretty sure the question
  was give the identity of the
  model and i thought it was a
  plum pudding model

YES^^^^ thats exactly what i
Thought

Can you say that the electrons are negative as opposed that in the diagram they showed circles?

3

1

Q2 - ke =1/2mv^2

Mr = 130

Mass in g = 130.4
X = 2.17x 10^-22

Would u get 4 marks if you put 130.4 for Mr and 2.17x10^-22 for mass??

5

Sped of Te

The middle option
where the they have
the same kinetic energy

noooo

particles change velocity not KE🩷

1

6 marker about
catalysts

2Fe(2+) + s2o8(2-) →
2fe(3+) + 2so4(2-)

2I(-) + 2fe(3+) →i
2fe(2+) + i2

• Fe(2+)
• Homogenous, gets remade
• catalyzes The
  reaction by providing
  an alternate reaction
  pathway with lower ea,
  without being used up -

Overall reaction - 2i(-) +
s2o8(2-) → i2 +
2so4(2-)

I effed this up because i wrote
about heterogeneous catalysts
I in a different state, i still wrote
all the equations and graph and
catalyst definition so maybe i got
like 3 marks?

I drew the graph like the first order
graph 📉 something like this? Is
that anywhere correct-yes!!

In 2nd equation i put autocatalysis
but an overall homogenous is this
okay or will i lose marks?

In overall equation i accidentally
included Fe the catalyst in the
overall eq ,Do 1 lose mark fo the
whole bullet point TT and i think i
get the graph wrong

Negative curve is it wrong

I did a graph that looks kinda like
1/x (steep at beginning and slows
down)

Is it a heterogenous catalyst?

No all ions so all aq

I did everything right except drew the graph going up instead of down in conc ffs

So u cant talk about catalyst
adsorbing onto surface?

Dont think so but may be wrong

nah thats hetero only fuck

6

Describe the
chelate effect

bidentate/multidentate
ligands have higher
entropy state so are
more stable and
displace the
monodentate ones

When bidentae and
multidentate ligands
replace monodentate

ligands in a complex

Bidentate and
multidentate ligands
replace monodentate
ligands from complexes
- resulting in a more
stable complex.

More molecules of products than reactants so products are more disordered

So large increase in entropy (so delta G is negative, reaction more feasible)

ISNT THERE MORE PRODUCTS
SO PROCDUTS MORE
DISORDERED? deltaS is positive?

Friend hii

What we thinking what grades/
boundaries -  think very low usually
this paper is 70-72 for an A so
probably 68-70? I think its gonna
be around 88 for an A

73 for an A last year wasnt it? It
may be lower this time round,
especially if the paper w

as found to be difficult

Yea i found out many people
thought it wasn’t

 quite hard. - lets just
hope they aint lying.

My teacher told our class that last
year’s class said they found it ezpz
but then they all got Es….yikes.

frrrr  - I just need an A just praying
to them examiner on s  is it for
med?

Im sure youll be fine, even w a B
tbh. Did u apply via UCAS?

2

Solubility of
Sr(OH)2

Sr(OH)2 + 2HCL ->
SrCl2 +  2h20

Mean titre was 32.40 +
32.45 = 32.425

0.789 

What was this question? Please
given context g per 100cm^3

Could u get marks without the
chemical equation? Yes you lose 1
i think tho > okay thanks what are
the marks fo?r

6

Identity of metal

Mg (Answer has to be a group 2 metal)

Highlight Mg this is right

charge and there were 2 of them
so i think it was mg

Sn? How many marks do you think id get if i put carbon i halved the mr

4?

Percentage Purity

What was this question?

75.9%

I got 82 i got 30.4

I also got 30.4

Should be 30.4

I got 76.1 am I cooked - i think  a
range was given

I got 55

Calculated impurity im dead

I got 30.4%

I got 30.1% bruh

74.7% lol

I ot 30.4% too

Do u not have to divide by 2 bc
there was 2 moles in the first
equation so it would be 38%

First eq was 2VO so must divide by
2 no?

I got 65.5? Where did I go wrong
same I got that too

Is this correct?

I got 30. Something

cj

4

pH

6.67 

12.31

WERE U MEANT TO MINUS OH-
yes - because it was a strong base and acid reaction,had to find the excess which was OH- so using Kw had to find H+ ions.  NO im so

cooked i realised i forgot to do that

i got 13.5 😪

3

5

8 marks
total for
all of ph
 questio
ns

Mole fraction of
H2

0.23

What was the fraction version

0.23 as a frac is 23/100 no i mean
the mole fraction like over total
moles. Ohhh lol. Uhm i cant
remember, srry

YOU ONLY GET 1 MARK IF U
WRITE IT AS A FRACTION

It was 0.92/4 what thats got to be bs its called mole “fraction”

How is the partial pressure 0.24 is it not atleast couple hundred cause the total pressure was 6000kpa

2

Calculate Kp
at 6000kPa and state unis

Kp = 2.57x10-5 

Units: kPa-1

0.6?5, 0.0321

Total pressure was like 6000

Did u have to multiply by total
Pressure??????? Yes then put it into Kp formula

4

Feasible
Temperature in
Celsius

4000 something 4500?
4800??? I got 4590
(rounded

Shouldve been ~4300
(410,000 J/90.1) - 273

4288.59 because K to celcius yay

Do u need to do 3sf

don't think it said

4?

What happens if
the volume of the
container is
bigger?

No effect

Temperature is the only factor
that changes kp

stop it i wrote no effect and then changed it 🫤

1

shape of
Cl3 ^ -

3LP + 2BP = Linear

No bent as lone pairs. Linear has no lone pairs.

1

Tl bond angle

180

is it not 104 as it was bent shape

Yh that what i though

Theres a positive so theres no lone pair no?

I got two lone pairs cause te is group 6 so 6 add 2 add 1 means there is 2 bp and 2lp right?

It was Tl not Te????????

How is it not 180?

It was 4 pairs, 2 lone 2 bonding wasnt it what?

It was Tl? How is there lone pairs?

There was no lone pairs?

What was the question again

Was bond angle of tullurium? Or was that another thing

Yh but what was the molecule

. Was it TlCl2- + was it not

It was TlCl2+ yah

Where is the lone pair coming from?

No idea

3

REDOX
EQUATIONS OF
Cl

2Cl- —> Cl2 + 2e-

I put Cl2 —> 2Cl- + 2e-

2ClO^3- + 12H^+ +
10e^- -> Cl2 + 6H2O

10Cl- + 2ClO3- + 12H+
-> 6Cl2 + 6H2O

3

[Fe(H2O)6]^3+ reacts with ethanedioate ions to form complex X include the charges

Its cool if you did skeletal structure for the carbons right? I still included all the oxygens

Yhh its fine cuz thats why i did

2

[Fe(H2O)6]2+ is reacted with Na2CO3. State an equation and observation.

[Fe(H2O)6]2+ left to stand and becomes yellowish-brown. Then is reacted with Na2CO3. State an equation .

(Think it was along the lines of that)

[Fe(H2O)6]2+ + CO3(2-) —> FeCO3 + 6H2O

Green Precipitate.

2[Fe(H2O)6]3+ + 3CO3(2-) —> 2Fe(H2O)3(OH)3 + 3CO2 + 3H2O

3

Meniscus multiple choice

A

1

Why is the atomic radius of calcium bigger than magnesium

Just said more shells of electrons

1

Why is the reaction faster barium does barium stop reacting before finished

-BaSO4 produced which is insoluble and will prevent more Ba2+ ions and SO42- ions coming into contact with each other

Does the precipitate prevent further reaction?????

I said that its faster because it loses electrons more easily which is wrong </3 think you had to describe that there were weaker metallic bonds.

Reaction of magnesium with steam

Mg(s) + H2O(g) —> MgO(s) + H2(g)

State symbols

Right yeah thanks

Nws :)

1

Born haber labels

2Na+(g) +2e- + O-(g)

2Na (s) + ½ O2 (g) 

2

Born Haber

Around +2576

I got 2752

2

Enthalpy of
solution

 +1.00

LOVED THIS

2

why wasn’t sodium
oxide in the data
book

Forms hydroxide?

Impossible to prevent
gaseous ions reacting

Reaction too vigorous?/ too dangerous to carry out irl

Rapidly reacts to form NaOH

Couldn't find out the value?
Sodium oxide is insoluble - ionic strength so insoluble - wrote the same thing

Enthalpy change at/ near 0?

1

Why does Na2O have a higher lattice dissociation than NaCl?

O2- has a higher charge than Cl-, electrostatic attraction is greater between Na+ and O2- than Na+ and Cl-, so more energy is required to dissociate the lattice

More polar ? greater efoa ?

2?

What is a perfectly ionic model

Assumes that the ions are perfectly spherical

And charge distributed evenly

Ions are “point charges”

Bonds are perfectly ionic/non covalent character? Maybe you need 2 of 3 points for the mark

1

• Chlorine with cold water

Cl2 + H2O ⇌ HCl +HClO

Can you put

Cl2 + H2O = Cl- + CO- + 2H+

1

Chlorine reacts with concentrated sulfuric acid

Write an equation for this reaction and the role of chlorine

Base/Proton acceptor

2

practical question?

EMF

Conventional cell

0.78V

 Fe(s)|
Fe2+(aq)||VO2+(aq),H+
(aq),V3+(aq)|
H2O(l)|Pt(s)

Equation at negative electrode:

Fe -> Fe2+ + 2e-

Where you getting zn from

Dk cant remember elements lol

Wasnt it Fe2 +

Yes and what other ?

Vo2+ ??

Ffs cant remember

 Does it not also include v2+??
Answer me plsss

OMG I PUT V2+ AS WELL

Okay maybe im wrong then

But was it not from VO2+ to V3+??

 Yeah but then i gets further
reduced

REally??

Do we need the pt?😔

I think so my friend did the same

will i get 0 for conventional one 😭

Yes you will

Was the question 1 mark? If 2
maybe you

I am sure it was

Did you need state symbols???

Isnt the V3+ next to the salt bridge?

Equation to form
NaAlH4

Na + Al +2H2 ->
NaAlH4

1

Why does NaAlH4
 have a high
melting point?

IONIC BONDING

AlH4 therefore negative

Electrostatic attraction
between Na+ and
[AlH4]-

Giant ionic lattice with
electrostatic attraction
between ions running
all throughout the
lattice.

Large amount of
energy is required to
overcome strong
electrostatic attraction.

I had more electrons so more vdw
force,probably wrong= same

Does it not have hydrogen bonding
cuz i wrote about that💀

^No there is no N,O or F atoms

I wrote that theres both covalent and ionic bonding so a substructure is formed with higher strength

3

Reaction between
H3PO4 and
excess NaOH

H3PO4 +3NaOH →
Na3PO4 + 3H2O

This can be in multiples rightttt?
Yes :)

1

what is the half
equation at the
positive electrode

Li+ + CoO2 + e- →
Li+[CoO2]-

YIPPEE

Is positive not anode where
oxidation is ? So Li to Li + NO

Positive electrode so +ve so
Reduction

I thought it was the negative electrode

1

Why are lithium
lithium ion
batteries
rechargeable?

 reaction, reactants
reformed upon
recharging

The reactions can be
reversed

Reaction is reversible same

Is equilibrium okay or not?

Yes

I said lithium regenerated i dont think thats right tho lmao

1